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.


By Dervish / Updated on November 29, 2023

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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:

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

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.


Solution #2: Assign a static drive letter by Command 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:

Download FreewareWin 11/10/8.1/8/7/XP
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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.


✍ 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 · Staff Editor
Dervish is an English editor of AOMEI Technology; He is delicated to offering users easy and effecitve solutions for issuses related to disks and partitoins. In his spare time, he enjoy wathcning films, playing footable, traveling and so on.