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How to assign a drive letter in Windows 10

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When you connect a new drive to your PC, Windows automatically assigns the next available letter after C, which is normally used for your system drive. So an external hard drive or USB thumb drive could end up as D, E, F, or whatever, depending on how many drive letters are already being used.

This is all well and good, but what if you want to assign the drive a letter? Maybe you want to use M for your music files or X for your top-secret X-Files. Here’s how in Windows 10.

  • Ensure that the drive you’re relettering isn’t in use and that no files from that drive are open.
  • Right-click on the Start button.
  • Click Disk Management to open the Disk Management console.
  • Right-click the volume that has the drive letter you want to change.
  • Click Change Drive Letter And Paths.
  • Click the Change button.
  • Choose from a list of available drive letters. (Don’t use A or B, which have historically been reserved for floppy drives and can sometime confuse older software.)
  • Click Yes if a popup windows appears asking if you really want to do this.
  • Close the Disk Management console.

You may need to restart your machine for the change to take effect, but once you do the drive will use the new letter.

More Windows tips…

  • How to turn on or off hibernate in Windows 10
  • Regain hard disk space by using Windows Update Cleanup in Windows 7 and 8.x
  • Restore a Windows XP backup in Windows 8
  • How to replace SkyDrive with Libraries in Windows 8.1
  • Pro tip: Use an optical Recovery Drive in Windows 8.1

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How to assign permanent letters to drives on Windows 10

You can assign drive letters manually, and in this guide, we show you how on Windows 10.

assign specific drive letter to usb

On Windows 10, when connecting a removable storage device or an internal hard drive, the system detects and assigns a drive letter automatically to make it usable. However, when reconnecting an external drive (such as a USB flash drive or SD or microSD cards), the system can end up assigning a different letter, which can be annoying.

If you want to see the same drive letter on a particular device, you can manually assign a permanent letter to any drive connected to your computer, and on Windows 10 , you can do this in at least three different ways, using Disk Management, Command Prompt, or PowerShell.

Using this approach will prevent Windows 10 from assigning a new letter or trying to set a letter already in use, which can cause conflicts. Also, it helps to select a drive letter that makes more sense to you.

In this Windows 10 guide, we walk you through several methods to manually assign a permanent letter to a drive, as long as you're connecting the drive to the same device and the letter isn't already in use.

How to assign a drive letter using Disk Management

How to assign a drive letter using command prompt, how to assign a drive letter using powershell.

To manage drive letters with the Disk Management tool, use these steps:

  • Open Start .
  • Search for Create and format hard disk partitions and click the top result to open the Disk Management experience.
  • Right-click the drive and select the Change Drive Letter and Paths option.
  • Click the Change button.
  • Select the Assign the following drive letter option.
  • Use the drop-down menu to assign a new drive letter. Quick tip: To avoid the system trying to assign the same letter to another drive, it's a good idea to start adding letters in backward order. For instance, instead of using D, E or F, it better to start with Z, Y or X when assigning a new letter.
  • Click the OK button.
  • Click the OK button again.

Once you complete these steps, the drive will permanently retain the assigned letter, even after reconnecting it. However, if you connect the drive to another device, it may receive a different letter.

While the easiest way to assign a new drive letter is to use Disk Management, you can also use DiskPart in Command Prompt to perform the same task.

To assign a drive letter using Command Prompt, use these steps:

  • Search for Command Prompt , right-click the result, and then select the Run as administrator option.
  • Type the following command to start DiskPart and press Enter : diskpart
  • Type the following command to list all the available volumes and press Enter : list volume
  • Type the following command to select the volume (drive) to assign a new letter and press Enter: select volume 3 In the command, make sure to change "3" to the number that represents the drive on your device.
  • Type the following command to assign a new drive letter, and press Enter : assign letter=Z The command assigns the letter "Z" to the drive assuming it's available. However, you need to make sure to change the letter for the one that you want to use.

After completing these steps, similar to Disk Management, every time you reconnect the storage to the same device, Windows 10 should assign the same letter automatically.

Alternatively, you can also use PowerShell to change a drive letter on Windows 10 using these steps:

  • Search for PowerShell , right-click the result, and then select the Run as administrator option.
  • Type the following command to list the available drives and press Enter : Get-Disk
  • Type the following command to assign a permanent letter to the drive and press Enter : Get-Partition -DiskNumber 1 | Set-Partition -NewDriveLetter Z In the command, make sure to change "1" to the number that represents the drive that you want to modify, and change "Z" for the new letter that you want to use.

Once you complete the steps, the drive will be accessible through File Explorer using the letter that you assigned, and Windows 10 won't try to change it.

Updated March 7, 2019: We revised this guide to make sure it's current with the latest version of Windows 10.

More Windows 10 resources

For more helpful articles, coverage, and answers to common questions about Windows 10, visit the following resources:

  • Windows 10 on Windows Central – All you need to know
  • Windows 10 help, tips, and tricks
  • Windows 10 forums on Windows Central

Get the Windows Central Newsletter

All the latest news, reviews, and guides for Windows and Xbox diehards.

Mauro Huculak

Mauro Huculak is technical writer for WindowsCentral.com. His primary focus is to write comprehensive how-tos to help users get the most out of Windows 10 and its many related technologies. He has an IT background with professional certifications from Microsoft, Cisco, and CompTIA, and he's a recognized member of the Microsoft MVP community.

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assign specific drive letter to usb

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Assign Permanent Drive Letter to USB Devices in Windows

Windows assigns drive letters to external USB devices in the order they are available and connected. If you have two hard disk drives and a disc drive ( ODD ), drive letters C, D, and E respectively would be assigned to them. When you connect a new external device, it is automatically assigned the next free drive letter: ‘F’. Generally it isn’t a problem, but if you have a backup software automatically backing files to an external hard disk or program running from the drive, this can cause issues. One way to fix this problem is by assigning a permanent drive letter to a device. Once assigned, no matter in which order you plug-in your device, it will always mount on the letter you chose.

Assigning a permanent drive letter to USB Devices

Disk Management Windows 7

  • Plug-in your external USB device
  • Press Win+R to open the Run dialog, and type in  diskmgmt.msc
  • All devices currently connected via the USB is listed in the Disk Management Console. Locate your USB drive, right-click on it, and choose “Change Drive Letters and Paths…” from the pop-up menu.
  • In the new dialog that opens, click on Change button – this will open another dialog

Change Drive Letter

  • “Assign the following drive letter:” option is pre-preselected, in its corresponding dropdown choose one of the unused drive letter. Choose one that’s high enough that it won’t be ever used by Windows.
  • Click OK, and confirm the warning that prompts you about the fact that some programs or shortcuts might stop working if you change the disk’s drive letter.

That’s it. You’re all set.

Test if the changes work by removing the USB device. Plug it back in, and then open Computer in Explorer to see the newly assigned drive letter in use with the device.

This method will work with all USB drives, flash drives, memory stick, phones and cameras.

Related tips:

  • Encrypt a USB Flash Drive using TrueCrypt on Windows
  • Format Your USB Drive as NTFS
  • Automatically Back Up Your Flash Drives and Memory Cards
  • Windows Experience Index Editor
  • Set a Doodle as Your Permanent Google Icon

How-To Geek

How to use the diskpart utility to assign and remove drive letters.

The Disk Management tool in Windows gives you an easy-to-use graphical interface to dealing with partitions and drive letters, but what if you want to just quickly change a drive letter on the command prompt? The diskpart utility makes it easy.

The Disk Management tool in Windows gives you an easy-to-use graphical interface to dealing with partitions and drive letters , but what if you want to just quickly change a drive letter on the command prompt? The diskpart utility makes it easy.

You'll need to start by opening an administrator mode command prompt -- type cmd into the search box, and then right-click and choose Run as administrator, or use the CTRL + SHIFT + ENTER keyboard shortcut.

assign specific drive letter to usb

Once there, run the diskpart command, and then type in the following to list out the volumes on your system.

list volume

You'll want to note the volume number next to the drive that you want to change the letter of. In our case, that number is 3.

assign specific drive letter to usb

Now we'll use the select volume command to tell diskpart to make changes to that volume. If your drive number is different, you'll want to replace the 3 with the number in your configuration.

select volume 3

You should see a message that the volume is now selected.

assign specific drive letter to usb

At this point you can easily assign a new drive letter. Just type in this command, substituting R for the drive letter you'd like to use:

assign letter=R

Make sure to hit enter once you're done, of course.

assign specific drive letter to usb

Once you've made that change, your drive should show up again as a new device, and be available for browsing immediately.

If you want to unassign a drive letter in order to hide the drive, you can also use the remove letter command in the same way. We wouldn't necessarily advise doing this, of course.

assign specific drive letter to usb

Don't bother trying to change your C: drive, because that's not going to work.

How to change drive letter on Windows 11

Here are four ways to assign a different letter to a drive on Windows 11.

Avatar for Mauro Huculak

On Windows 11 , a “drive letter” is automatically assigned to each internal storage, USB drive, DVD drive, and map network drive to identify the volume and make it available on File Explorer or other applications. However, you can change the drive letter to anything you want without deleting the data on the storage. For instance, if you want a drive to use a specific letter related to the content, or the system tries to assign a letter already in use, preventing the storage from appearing on File Explorer and apps.

Whatever the reason, on Windows 11, you can assign a different drive letter in at least four ways using the Settings app, Disk Management, Command Prompt, and PowerShell.

A drive letter (or device letter) can be any character from the English alphabet. However, you cannot use the “C:” because it’s reserved for the main storage that contains the installation. Also, “A:” and “B:” are reserved letters that used to be assigned automatically to floppy drives.

This guide will teach you how to assign a new drive letter on Windows 11.

Change drive letter on Windows 11

  • Change drive letter from Disk Management on Windows 11

Change drive letter from Command Prompt on Windows 11

Change drive letter from powershell on windows 11.

To change the drive letter on Windows 11, use these steps:

Open Settings on Windows 11.

Click on System .

Click the Storage tab.

Under the “Storage management” section, click the “Advanced storage settings” option.

Click on Disks & volumes .

Open Disks & volumes

Select the drive with the volume with the letter to change.

Select the volume and click the Properties button.

Open driver properties

Click the “Change drive letter” button.

Change drive letter

Select the new drive letter for the device connected to Windows 11.

Assign drive letter on Windows 11

Click the OK button.

Once you complete the steps, the system will change the drive’s letter on Windows 11.

Change drive letter from Disk Management

To change the drive letter with Disk Management, use these steps:

Open Start .

Search for Create and format disk partitions and click the top result to open the Disk Management tool.

Right-click the volume and select the “Change Drive Letter and Paths” option.

Change drive letter and paths

Click the Change button.

Disk Management change drive letter

Select the “Assign the following drive letter” option.

Choose a different letter for the drive.

Disk Management assign new drive letter

Click the OK button again.

After completing the steps, the drive will appear in File Explorer with the new letter.

To add a new drive letter with Command Prompt, use these steps:

Search for Command Prompt , right-click the result, and select the Run as administrator option.

Type the following command to launch diskpart and press Enter :

Type the following command to list the volumes and press Enter :

Type the following command to select the volume (drive) to change the letter and press Enter :

In the command, change “2” for the number corresponding to the storage you want to change the letter.

Type the following command to change the drive letter on Windows 11 and press Enter :

In the command, change “H” for the letter you want to use with the drive.

DiskPart change drive letter

Once you complete the steps, the diskpart tool will assign the new letter to the storage.

To change a Windows 11 drive letter with PowerShell, use these steps:

Search for PowerShell , right-click the result, and select the Run as administrator option.

Type the following command to identify the hard drive to change the letter and press Enter :

Type the following command to assign or change the drive letter to internal or external and press Enter :

In the above command, change “0” with the disk number of the drive you want to format and “F:” with the letter you wish to assign to the storage.

PowerShell change drive letter

After completing the steps, the drive will have a new letter assignment. If the drive was previously missing, it will appear in File Explorer.

Avatar for Mauro Huculak

Mauro Huculak is a Windows expert and the Editor-in-Chief who started Pureinfotech in 2010 as an independent online publication. He is also been a Windows Central contributor for nearly a decade. Mauro has over 12 years of experience writing comprehensive guides and creating professional videos about Windows, software, and related technologies, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter) , YouTube , LinkedIn and About.me .

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The Best Windows Disk Partition Manager and PC Optimizer

assign specific drive letter to usb

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How to Permanently Assign Drive Letter with Ease

A permanent drive letter prevents us from being confused with multiple USB drives. Then, how to permanently assign drive letter with ease? This post offers three effective ways to make it.

Dervish

By Dervish / Updated on November 29, 2023

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Solution #1: Assign a persistent drive letter with Disk Management

Solution #2: assign a static drive letter by command prompt.

Solution #3: Assign drive letter permanently with the best freeware

Why need to permanently assign drive letter?

As we know, Windows assigns drive letters to all the drives that are available on the computer, such as internal hard disks, optical drives, SD cards, and external USB drives. Drive letters are alphabetical identifiers for volumes and each drive letter can be used once on one computer.

However, some users discover USB drive letter keeps changing each time they connect it to the same computer . It happens frequently if they use multiple USB drives on one computer. That’s really frustrating! At this time, assigning permanent drive letters to USB drives is needed.

In addition, some users perform regular backup between the USB drive and the computer via a USB hidden copier . With a persistent drive letter, the backup task can be recognized and repeated by the backup utility smoothly. What we need to do is to permanently assign drive letter.

How to permanently assign drive letter with ease?

How do I permanently set a drive letter? There are three efficient solutions I’d like to recommend to you. Learn how to assign a static drive letter in Windows 10 below:

1. Hit Windows Key + X on your keyboard, and select Disk Management from the menu.

2. Right click the USB drive to which you want to assign a persistent drive letter and select “Change Drive Letter and Paths.”

Change Drive Letter and Paths

3. In the pop-up window, click “Change”.

Select Change

4. In the next window, choose a proper drive letter for your USB drive using the drop-down menu and click “OK”.

Assign Drive Letter

✐ Tips: You may choose a rarely-used drive letter like M-Z, thus avoiding possible drive letter conflicts.

5. You will get a prompt that some programs might rely on drive letters to run properly. Click “Yes” to continue as long as the drive letter you assign here is not occupied by another drive where the programs are installed.

Prompt

1. Tap the Search button on the taskbar and type “cmd” in the search box. Right-click “cmd” and select “Run as administrator”.

2. Type diskpart and press Enter.

3. Type list volume and press Enter.

4. Type select volume # (ex: volume 7) and press Enter to select the USB drive to be assigned a static drive letter. You may get indication from the size of the volume.

5. Type assign letter=# (ex: letter=M) and press Enter to assign a new drive letter.

6. Double type exit and press Enter to exit Diskpart and Command Prompt successively.

Command Prompt

Solution #3: Assign drive letter permanently with the best freeware

AOMEI Partition Assistant Standard , the best partition manager, can help you assign a permanent drive letter to a USB drive. It can be operated with mouse-clicking and it’s totally free. Besides, it offers many other powerful features to help you manage disks and partitions better such as resizing/moving partitions , deleting partitions, formatting partitions, deleting large files , etc.

Just follow the instructions below to see how to permanently assign drive letter:

Step 1. Download, install, and launch AOMEI Partition Assistant. Right-click the USB drive which you want to give a permanent drive letter to, select “Advanced” and then “Change Drive Letter”.  

Change Drive Letter

Step 2. Select a new drive letter in the pop-up window. You are suggested to choose a rarely-used drive letter like M-Z.

Select Drive Letter

Step 3. Click “Apply” to view pending operations and then “Proceed” to commit the operations.

Proceed

✍ Note : To change partition type ID for MBR disk partitions and change serial number on a certain partition, please upgrade to AOMEI Partition Assistant Professional .

You have learned three exact ways to permanently assign drive letters for USB drives. After you commit one of the solutions, every time you connect the same drive to the same computer, Windows 10 will automatically recognize it and set the same letter. However, if you insert your external drive into another computer, it is likely to get a different drive letter. Apart from assigning a drive letter to a certain drive permanently, you can also repair pen drive not detected and fix the error that C drive is RAW with AOMEI Partition Assistant. Go for this tool and you won’t regret!

Dervish

Related Articles

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This post will show you how to use Diskpart assign drive letter in Windows 11, 10, 8, 7. In addition, another free GUI software will be introduced to assign or remove the drive letters.

Drive Letter Not Available-Why and How to Solve It?

Can’t assign drive letter in Disk Management because a certain drive letter is not available? Follow this article to solve it efficiently.

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Home » Tech Tips » Windows » How to Assign or Change Drive Letter in Windows 11?

How to Assign or Change Drive Letter in Windows 11?

Windows by default uses C drive (C:) for hosting system and application files. You can choose different drives like D: instead of C: while installing Windows on your computer. Similarly, it is also possible to manually change the installed app’s location , though generally users install apps on C: drive. Did you anytime think of changing the existing drive letters in your system? Here is how you can do that in Windows 11 PC.

Default Drive Name Assignments in Windows 11

Let us say, you have two partitions C: and D: volumes on your hard disk. Here is how the default drive letter assignment in Windows work:

  • A: – floppy disk drive for IBM computers (obsolete)
  • B: – floppy drive for MS-DOS and Windows computers (obsolete)
  • C: – Windows and app installation files
  • D: – storage space partition
  • E: – the letter after your storage partition for CD drive (if CD/DVD drive is available)
  • F: onwards – removable storage disks like USB and external hard disks

When you have more partitions on the hard drive, system will use the next drive letters like E: or F: when you insert an external drive. For example, when you have C: and D: drives on your hard disk and insert an USB drive , it will take the letter E: or later.

Changing Drive Letters in Windows 11

It is not necessary to live with the assigned drive letters forever on your system. You can either reduce / increase the drive’s space and assign new letters or simply change an existing drive’s letter. For example, you have 400GB D: drive which you can simply change to F: drive. Alternatively, you can divide it into 200GB + 200GB drives and name them as G: and H: drives.

Windows 11 makes it easy to change the drive letters from the Settings app without using registry or changing system files. However, you can also do the same from Computer Management as with the case in Windows 10 .

1. Change Drive Letter from Windows 11 Settings

If you want to change the assigned drive letters for any partition on your hard disk except C drive then this is the option you should proceed with.

  • Press “Win + I” keys or use Windows Search to find Windows Settings app.
  • Once you are in the Settings app, go to “System” tab and then click on “Storage” option.

Go to System Storage Settings

  • Go down to the bottom of the “Storage” settings section and click on “Advanced storage settings” available under “Storage management” section.

Advanced Storage Settings

  • This will expand the section and click on “Disks & volumes” option.

Go to Disks and Volumes

  • The “Disks and volumes” section will show all your existing drives and click on the one you want to change the letter name. it will show two buttons – “Explore” and “Properties” and click on the “Properties” button.

Open Disk Volume Properties

  • On the next screen, you can see the buttons for “Change label” and “Change drive letter”.

Select Change Drive Letter

  • Click “Change drive letter” button and select your favorite letter from the dropdown to assign.

Change Label for C Drive

The dropdown will show all letters except C: and the current volume. In the above example, we want to change the D: drive and the system shows A to Z letters except C and D. Since D is the current volume, it is not shown in the list. But C is not shown because it is a system volume partition and you cannot change the drive letter for C. You will not see “Change drive letter” button when selecting properties of C drive. However, you can assign A and B for drive letters which were once reserved only for floppy disks. Since floppy disk is obsolete Windows allows you to assign those reserved drive letters A and B also.

2. Change Drive Letter from Disk Management in Windows 11

Though changing drive letter is easy with Windows Settings, it does not allow changing C drive letter. You can use Disk Management app for changing any drive letter with additional features.

  • Press “Win + R” keys to Run prompt .
  • Type compmgmt.msc and press “OK” button.

Open Disk Management App in Windows

  • This will open Computer Management app and select “Disk Management” from the sidebar available under “Storage” section.
  • You will see all the drives available on your computer and select C or D or any drive that you want to assign a new letter.
  • Go to “Action > All Tasks > Change Drive Letter and Paths…” menu.

Change Drive Letter in Disk Management

  • On the pop-up that appears, click on “Change…” button.

Select Change Button

  • Click on the dropdown against “Assign the following drive letter:” option.
  • Select your favorite letter and click “OK” button.

Assign New Drive Letter

Here you will see all the drive letters except D which is already assigned to another partition volume on the hard disk. Though it is possible to change drive letter for C, we do not recommend as it can affect the installed programs on your computer. Most programs by default install under “Program Files” section in C drive. Changing the drive letter may affect the installed programs and they may stop working. In such a case, you need to uninstall and reinstall the program on the new drive again. This will be a big task if multiple programs stopped working. Therefore, choose the system drive when you clean install Windows first time and stick with that. If you are using preinstalled Windows on C drive, then continue to use that without changing. You can change all other drives using Disk Management or Windows Settings app.

If you want to create parition, select the volume and right click on it. From the menu, select “Shrink Volume” option and select the reduced size for your volume. The remaining size will become unallocated for which you can assign a new label and letter as explained above. Learn more about how to create disk paritions in Windows computer .

Assigning Drive Letter to Removable Disks

As mentioned, Windows will assign the available drive letter for removable disks after the current partition volumes. The problem is when you have multiple removable disks, the assigned letters will change every time which may confuse you. The good part is that you can assign a drive letter as explained above for your removable USB or external hard disk. Windows will remember the assigned letter and use the same whenever you insert the external drive. However, make sure to use the letters clearly away from the current and CD/DVD drives. For example, you can use X or Y or even A or B which are generally not assigned.

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How to assign a specific drive letter to an USB drive

change drive letter

Dante send in this little tip and I thought I would share it with everyone as it can be quite useful. I have reviewed the free program USB Drive Letter Manager before here on Ghacks which enables you to assign specific driver letters to USB devices that you connect to the PC. The benefit here is that the device will always be mapped to the driver letter - provided it is available - once you assign the driver letter to it.

This helps with the identification of the drive as you know that it is always accessible under a specific driver letter when you connect it. I mentioned in that review that you could use the Windows tool Disk Management to assign driver letters to USB Flash drives as well, but did not explain how you could do so.

Dante explained how you can use the Disk Management tool to assign permanent drive letters to removable drives. He also mentioned that the reviewed program USB Drive Letter Manager was not compatible with Windows Vista at the time of writing, and that it makes sense to use the first party program instead.

The easiest way to open Computer Management on the operating system is to right-click the My Computer icon or Computer icon on your desktop, if it is displayed there, and select Manage from the context menu that opens up.

You can alternatively press Windows-r, enter compmgmt.msc and tap on the enter key to load the Computer Management tool this way. If you are running a newer version of Windows, like Windows 7, you may need to run the program with elevated rights. If that is the case press Windows, enter the program name and extension, and right-click the selection afterwards and select run as administrator from the menu.

Switch to the Disk Management listing under Storage and right-click on the drive that you want to assign a drive letter to.Select Change Drive Letter and Path to pick a new letter for the selected drive. This will be the drive's permanent letter from then on out.

You can modify the drive letter at any point in time again by following the instructions above and changing the drive letter to another available letter.

How to assign a specific drive letter to an USB drive

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Many thanks. I have done this before twice but forgotten how. Got here with Google search and will try to save where I can find again.

Thanks for that tip. Much appreciated. I was wondering how to accomplish this. I am always powering down and copying to a local machine from my network in order to get the data I need to my USB because it interferes with the drive letter assignments of my network. Thanks again, I’ll try this.

lifehacker did something similar recently where you can assign a custom icon to a usb thumb drive.

http://lifehacker.com/software/usb-drive/assign-a-custom-icon-to-your-flash-drive-188852.php

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assign specific drive letter to usb

2 Answers 2

USBDLM is a Windows service that gives control over Windows' drive letter assignment for USB drives. Running as service makes it independent of the logged on user's privileges, so there is no need to give the users the privilege to change drive letters. It automatically solves conflicts between USB drives and network or subst drives of the currently logged on user. Furthermore you can define new default letters for USB drives and much more. It works on Windows XP to Windows 10.

montonero's user avatar

  • 3 This is the only reliable solution I've found for controlling what drive letter gets assigned to removable drives. Windows offers no builtin functionality that does this. –  I say Reinstate Monica Apr 26, 2019 at 11:37
  • 1 @TwistyImpersonator "Windows offers no builtin functionality..." - see my answer. –  alephzero Apr 26, 2019 at 21:56
  • @alephzero No...sadly doing what you propose doesn't work. Your answer is the closest to what Windows can do, but it falls short of being a reliable solution. –  I say Reinstate Monica Apr 26, 2019 at 23:07

Windows has a built in tool to assign a persistent drive letter to an external drive. Of course this may not be a complete solution if you have a large number of removable drives and can't assign a consistent fixed set of drive letters to them.

These instructions are for Windows 10, but earlier versions should be similar.

Mount the external drive you want to assign a permanent letter to.

Click the Windows icon and start typing "format". Select "Create and format hard disk partitons, Control panel" when Windows suggests it. The app opens a window titled Disk Management.

Select the external drive from the list, right-click, and select "Change Drive Letter and Paths..."

and from that point, follow your nose!

alephzero's user avatar

  • 3 "make Windows assign only letters that are in the interval you want (for example S - Z)?" Your answer does not solve this. –  Moab Apr 26, 2019 at 22:26
  • 2 It solves it, if you have a fixed enumeration of usb drives. It does not solve it for generic drives. –  Mooing Duck Apr 27, 2019 at 0:20

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assign specific drive letter to usb

assign specific drive letter to usb

Top Contributors in Windows 10: Ramesh Srinivasan  -  neilpzz  -  Horace Wiggins  -  franco d'esaro  -  _AW_   ✅

February 14, 2024

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Ramesh Srinivasan  -  neilpzz  -  Horace Wiggins  -  franco d'esaro  -  _AW_   ✅

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In Windows 10 how do I revert drive letter allocation for a specific USB drive so that it receives the next available letter?

When I plugged in a specific USB memory stick to a particular PC (Windows 10) it was being allocated a specific drive letter "O" which I probably assigned manually sometime in the past. I've now decided I don't want this drive to be given this letter any more. So I thought this would be easy - just remove the drive letter via Disk Management and "Change Drive Letter and Paths" and Windows will then revert to the standard behavior of allocating the next available letter. Unfortunately this doesn't happen! Windows now refuses to allocate a drive letter automatically meaning that the drive cannot be accessed through File Explorer although it does appear in Disk Management (but without a drive letter). If this same drive is connected to another PC the random drive letter allocation works as expected.

I can fix this by re-allocating a fixed drive letter again to the drive via Disk Management. But does anybody know how to tell Windows to resume back to the normal drive allocation behavior short of trying to invoke a system restore or reinstalling Windows? Shaun.

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  • Microsoft Agent |

Welcome to Microsoft Community.

I'm Hahn and I'm here to help you with your concern.

I’m sorry to hear that you are having trouble with your USB drive letter. You can try the following steps to remove a fixed drive letter and let Windows assign it automatically:

If "Change Drive Letter and Paths in the context menu" does not work, you may need to use command prompt or PowerShell commands to remove the drive letter.

To use command prompt or PowerShell commands to remove a drive letter, you need to open an elevated command prompt or PowerShell window. Then you can use one of the following methods:

Using Diskpart:

Type diskpart and press Enter.

Then type list volume and press Enter.

Make note of the volume number for the drive letter you want to remove.

Then type select volume <volume number> and press Enter.

Finally, type remove letter=<drive letter> and press Enter.

Using PowerShell:

Type Get-Volume -DriveLetter <drive letter> | Get-Partition | Remove-PartitionAccessPath -AccessPath "<drive letter>:\" and press Enter.

Please be careful when using these commands as they can affect your system if used incorrectly. You may want to back up your data before proceeding.

I hope this helps. If there is anything not clear, please do not hesitate to let me know.

Your Sincerely

Hahn - MSFT | Microsoft Community Support Specialist

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Hello Hahn,

Thank you for your suggestion about using DISKPART instead of

" Change Drive Letter and Paths " via " Disk Management ".

I followed your notes and then unplugged the drive, re-plugged it and

restarted Windows and still the drive does not appear within File Explorer. I then re-assigned a drive letter “S:” to it and tried the PowerShell route: Remove-PartitionAccessPath -disknumber 1 -partitionnumber 1 -accesspath S:

The drive vanished from File Explorer as I would expect. On disconnecting and re-connecting it, Windows will still not assign a letter to it.

So unfortunately I'm experiencing the exact same behavior as I originally described. Once the drive letter

has been “Removed” (in whatever way), Windows thereafter steadfastly refuses to assign a drive letter automatically. If I connect the same drive to another PC, a drive letter

is allocated as normal.

Therefore there seems to be a low level association between the particular USB drive and

the PC on which the drive letter was removed which Windows remembers and then decides

to never again assign a letter automatically to that specific drive. I haven’t tried reformatting the drive but even if that fixes the problem it would seem a drastic

way to get around it.

1 person found this reply helpful

Ramesh Srinivasan

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Unplug the USB disk (physically).

Open a Command Prompt (admin) window.

mountvol /R

Plug the USB stick now.

Let's know if that works.

5 people found this reply helpful

I did as you suggested:

then connected the drive.

Initially the drive wasn't being detected (except in Device Manager under USB Controllers and "USB Mass Storage Device") so I re-started Windows. It still wasn't being detected (not even in Disk Management) until I unplugged it and re-connected a couple of time when a File Explorer window suddenly popped up showing the drive's contents and the next available drive letter E: assigned nicely. So mountvol /r seems to be the solution for which I thank you. Even then, Windows does seem

to take some prodding before it will eventually mount the device and assign a drive letter.

But I can live with that as it's rare that I would want to remove a drive letter anyway. I'll do a little more testing tomorrow and post again with the results. Regards,

Let's know how it goes.

I'll see if I can test Mountvol /R with a USB mass-storage device instead of a USB flash drive.

I'm glad that the mountvol /r command worked for you in resolving the issue of the drive not being automatically assigned a drive letter by Windows. It's possible that the previous drive letter assignment had caused some kind of conflict with the current system configuration, leading to the issue you experienced.

As you mentioned, Windows can sometimes take a little time to detect and assign a drive letter to a newly connected device. This can be due to various reasons such as driver installation, disk initialization, or other background processes that may be running on the system. In general, it's always a good idea to wait for a few seconds after connecting a new device to allow Windows to detect and configure it properly.

If you encounter any further issues or have any more questions, feel free to ask.

Thank you for your valuable input. I tried a fresh test this morning with a different USB memory stick (FAT32 although I don't imagine the file system is relevant), removing the drive letter (which I see now is in effect removing the mount point), disconnecting the drive, running mountvol /r and then after waiting for a minute or so, reconnecting it. But today it was not auto-mounted even after a Windows restart. Yesterday, it did auto-mount but not until several disconnections and re-connections.

It seems to be temperamental. Assigning a drive letter (or using "mountvol E: \\?\Volume{9ae43941-c41e-11ed-87b6-b8ac6fd8cf14}\" assuming the device ID is known) does work immediately but then we're back to where we were with a fixed drive letter which is what I was originally trying to undo. But as I've been writing I've just tried the whole thing again after mounting it to a specific drive letter, removing it, running mountvol /r, waiting a few seconds, re-connecting and now it works almost immediately with File Explorer popping up nicely.

I can't see a pattern here but at least I now know what to try in the future.

It's good to hear that you were able to get it to work eventually. It does sound like the behavior of the USB device is a bit temperamental, and it's difficult to identify a pattern in the way it behaves. It could be due to a number of factors such as hardware issues, driver issues, or even the operating system's handling of the device.

In any case, it's good to know that assigning a drive letter works for you if you need to access the device quickly. You may want to consider keeping a backup of your important files on another device or cloud storage to avoid any data loss in case the USB device fails completely.

I agree with everything you say and am well aware there are many factors at play. I've been working with Windows for more years than I care to remember and there always seems to be something new to learn.

Still, I'm a little surprised that Microsoft don't have a more fool-proof way to address this issue in the GUI with, say, a tick box within the "Change Drive Letter and Paths" window called "Automatically assign a Drive Letter". You and I may be comfortable with exploring options from the command line but I suspect most end users would find it difficult although I suppose they probably wouldn't have reason to remove a drive letter in the first place. You are certainly correct that backing up the memory stick is advisable as, although I didn't mention it, more than once while I was experimenting, Windows told me the "USB device not recognized" which was disconcerting to say the least although it was eventually recognized and the contents were intact. Another reason for some surprise that this whole area of drive letters and mounting is not more robust and easier to manage given the maturity of the OS at least as far as Windows 10.

I understand your concerns and frustrations regarding the management of drive letters in Windows. While it is true that Microsoft could potentially make the process more user-friendly, there are many technical complexities involved in managing hardware devices and assigning drive letters.

That being said, Microsoft has made efforts to simplify the process in Windows 10. For example, the Disk Management tool includes a feature that allows users to easily change the drive letter of a device by right-clicking on the device and selecting "Change Drive Letter and Paths". This feature also allows users to assign a new drive letter to a device, which can be especially useful when a device is not automatically assigned a letter.

It is also worth noting that the issue you encountered with the USB device not being recognized may not necessarily be related to the management of drive letters. There are many factors that can cause a device to not be recognized, such as hardware malfunctions or driver issues. Therefore, it is always a good idea to back up important data on a regular basis to prevent data loss.

Overall, while the management of drive letters in Windows can be complex, there are tools and resources available to help users manage their devices effectively. It is always a good idea to research and familiarize oneself with the process before making any changes to device configurations.

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COMMENTS

  1. Windows Tip: Assign Permanent Letters to Removable Drives

    1. To set this up, plug in the drive that you want to assign a permanent letter. Then open the Run dialog ( Windows Key+R) and type: compmgmt.msc and hit Enter or click OK. Or, right-click...

  2. How to Assign a Persistent Drive Letter to a USB Drive in Windows

    Home Hardware How to Assign a Persistent Drive Letter to a USB Drive in Windows By Walter Glenn Published Feb 1, 2017 If you use multiple USB drives, you've probably noticed that the drive letter can be different each time you plug one in. Readers like you help support How-To Geek.

  3. Three Easy Ways to Change USB Drive Letter in Windows 11, 10, 8 or 7

    Step 1. Press Windows + R in Windows 11/10/8/7, input " diskmgmt.msc " and hit Enter key to open Disk Management. Step 2. Right-click the USB partition that you want to change the drive letter and choose Change Drive Letter and Paths.... Step 3. In the pop-up window, click Change… .

  4. batch

    Unlike DOS 6.22, where you can permanently assign drive letter designations (e.g. Drive C: = Hard Disk Bootable Partition, Drive D: = CD Drive, or any additional partitions you want to create with FDISK, depending on which version of Windows you are running), if in Windows XP I connect a USB flash drive, it will assign it drive E:, in Windows Vi...

  5. How to assign a drive letter in Windows 10

    Right-click on the Start button. Click Disk Management to open the Disk Management console. Right-click the volume that has the drive letter you want to change. Click Change Drive Letter...

  6. How to assign permanent letters to drives on Windows 10

    While the easiest way to assign a new drive letter is to use Disk Management, you can also use DiskPart in Command Prompt to perform the same task. To assign a drive letter using...

  7. How to assign permanent drive letters to removable USB hard drives

    3 Answers Sorted by: 23 You can do this in Computer Management without external tools. The interface is slightly different in Windows 7 but the location is the same. Start -> Type compmgmt.msc and press Enter -> Storage -> Disk Management or Press Win + x and then press k to choose Disk Management. Share Improve this answer Follow

  8. How to Assign the Same Drive Letter for USB Drive in Windows

    Launch the Registry Editor ( regedit.exe) Go to the MountedDevices registry branch below: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices Rename the \DosDevices\G: value to \DosDevices\R: Exit the Registry Editor. Next time when you connect the same drive, Windows assigns it the R: drive letter if it's free. USB Drive Letter Manager (USBDLM)

  9. How to Change a Drive Letter on Windows 10 or Windows 11

    Click the Start button, type "Disk Management" in the search bar, and then hit Enter. The program name displayed in the search will not be Disk Management. It will be "Create and format hard disk partitions." You could also hit Windows+X or right-click the Start button, and then click "Disk Management."

  10. Change and Assign Drive Letter in Windows 10

    1 Press the Win + R keys to open Run, type diskmgmt.msc into Run, and click/tap on OK to open Disk Management. 2 Right click or press and hold on the drive (ex: "F") you want to add or change the drive letter, and click/tap on Change Drive Letter and Paths. (see screenshot below) 3 Click/tap on the Change button. (see screenshot below)

  11. Assign Permanent Drive Letter to USB Devices in Windows

    Follow these steps: Plug-in your external USB device. Press Win+R to open the Run dialog, and type in diskmgmt.msc. All devices currently connected via the USB is listed in the Disk Management Console. Locate your USB drive, right-click on it, and choose "Change Drive Letters and Paths…" from the pop-up menu. In the new dialog that opens ...

  12. Assign Permanent Drive Letters To A Removable USB Drive ...

    Select the USB drive you want to assign a permanent letter to, right-click it, and select 'Change Drive Letter and Paths…' from the context menu. In the dialogue box that opens, click change which should open an action box called 'Change Drive Letter or Path'. Select the drive letter you want to assign it, and click OK to save the changes.

  13. How to Use the Diskpart Utility to Assign and Remove Drive Letters

    select volume 3. You should see a message that the volume is now selected. At this point you can easily assign a new drive letter. Just type in this command, substituting R for the drive letter you'd like to use: assign letter=R. Make sure to hit enter once you're done, of course. Once you've made that change, your drive should show up again as ...

  14. usb

    1 Answer Sorted by: 5 The short answer is that there is no way to have a USB drive always get the same drive letter when attached to multiple systems. To get the same drive letter you'd have to use a script to do this on insertion of the drive into the computer.

  15. How to change drive letter on Windows 11

    Open Start. Search for Create and format disk partitions and click the top result to open the Disk Management tool. Right-click the volume and select the "Change Drive Letter and Paths" option. Click the Change button. Select the "Assign the following drive letter" option. Choose a different letter for the drive.

  16. How to Permanently Assign Drive Letter with Ease

    1. Hit Windows Key + X on your keyboard, and select Disk Management from the menu. 2. Right click the USB drive to which you want to assign a persistent drive letter and select "Change Drive Letter and Paths." 3. In the pop-up window, click "Change". 4.

  17. Assigning fixed drive letters to USB Devices on Windows Server (2012)

    run a powershell script (via the scheduled task) that assigns the driveletter if the DeviceID matches one of the backup drives So the question is: Is it somehow possible to assign a fixed driveletter to a set of usb devices without having to run a script everytime a device is attached?

  18. Windows 10 fails to assign drive letter to external USB hard disk drive

    1. Open a CMD prompt with Administrator previlege. 2. Type in DiskPart and hit Enter. 3. Run the following commands one by one. Case insensitive. List Disk Identify your external drive from the given list manually. Assume it's disk # (a number), and run Select Disk # Select Partition 1 Attribute Volume Clear NoDefaultDriveLetter Done.

  19. How to Assign or Change Drive Letter in Windows 11?

    Go to "Action > All Tasks > Change Drive Letter and Paths…" menu. Change Drive Letter in Disk Management. On the pop-up that appears, click on "Change…" button. Select Change Button. Click on the dropdown against "Assign the following drive letter:" option. Select your favorite letter and click "OK" button.

  20. windows 10 does not assign a drive letter to my external USB drive

    Press the Start key and type the word CMD, right click on the command prompt and select Run as administrator, enter the following commands one by one followed by the Enter key: •- DISM.exe /Online /Cleanup-image /Scanhealth •- DISM.exe /Online /Cleanup-image /Restorehealth •- DISM.exe /online /cleanup-image /startcomponentcleanup •- sfc /scannow

  21. How to assign a specific drive letter to an USB drive

    Switch to the Disk Management listing under Storage and right-click on the drive that you want to assign a drive letter to.Select Change Drive Letter and Path to pick a new letter for the selected drive. This will be the drive's permanent letter from then on out. You can modify the drive letter at any point in time again by following the ...

  22. How to limit Drive Letters Windows assigns to new removable USB drives

    15 Currently Windows (all of the versions) assigns the first available letter to the next removable media you insert into your USB drive. Is there a way to go around this to make Windows assign only letters that are in the interval you want (for example S - Z)? windows usb disk-management drive-letter removable-media Share Improve this question

  23. In Windows 10 how do I revert drive letter allocation for a specific

    Using Diskpart: Type diskpart and press Enter. Then type list volume and press Enter. Make note of the volume number for the drive letter you want to remove. Then type select volume <volume number> and press Enter. Finally, type remove letter=<drive letter> and press Enter.