How to Change a Drive Letter in Windows

Changing a drive letter can make a storage drive easier to identify, resolve a letter conflict, or help keep removable drives consistent. It changes the drive’s path in Windows, such as from E: to F:; it does not rename the drive or move its files. These instructions apply to Windows 10 and Windows 11. Menu wording and layout may differ slightly by version.

What You’ll Need

A Windows PC and access to an account with administrator permissions.
The drive you want to change, connected and visible in Windows. For an external drive, connect it directly and wait for it to appear.
A new, unused drive letter. If the intended letter is already assigned, you will need to free it first or choose another.
A few minutes to close applications and update any shortcuts or settings that depend on the current letter.

Changing a letter normally leaves the drive’s files intact, but programs and links may still look for the old path. If the drive contains important information, make sure you have a current backup before changing settings.

Step-by-Step

Identify the correct drive. Open File Explorer and note the drive’s current letter, name, and approximate capacity. If you are unsure which entry it is, compare these details with the drive you intend to change. Do not proceed based on a letter alone.
Close anything using the drive. Save open documents, exit programs that read or write to it, and safely eject other removable storage you are not working on. This reduces the chance of an app failing when its file path changes.
Open Disk Management. Right-click the Start button and select Disk Management. You can also search Windows for “Create and format hard disk partitions.” The wording or route may differ slightly by version. Approve the administrator prompt if one appears.
Find the volume by its details. In Disk Management, locate the volume that matches the drive’s current letter and capacity. The upper pane lists volumes; the lower pane shows disks and their partitions. Be especially careful to distinguish a data volume from recovery, system, or other partitions.
Open the letter controls. Right-click the correct volume in the upper list or its matching partition in the lower pane, then choose Change Drive Letter and Paths. Check the displayed letter once more before continuing.
Choose Change. In the dialog, select the current drive-letter entry and click Change. If there is no existing letter, choose Add instead to assign one. Do not select Remove unless your goal is to leave the volume without a letter.
Select an available letter. Choose the desired letter from the dropdown and click OK. Windows does not offer a letter that is already in use. If a warning says programs may not run, read it and confirm only if you understand the impact and have selected the right volume.
Verify the result. Close Disk Management and check File Explorer. Confirm the drive now appears under the new letter and that you can open its folders. If it is removable, safely eject it before disconnecting it.
Update dependent paths. Change shortcuts, backup jobs, media libraries, scripts, or application settings that point to the old letter. An application may need to be restarted or have its files located again.

If Windows says the change cannot be completed, do not format or initialize the drive as a workaround. Those options can affect data. Read the troubleshooting section first and check that the volume is not in use or protected.

Common Mistakes

Changing the wrong volume: A disk may contain several partitions, and the lower pane can be confusing. Match the letter and capacity, and avoid changing small system or recovery partitions.
Trying to change the Windows boot drive: Do not change the letter of the volume Windows starts from, usually C:. Windows and installed programs rely on its expected path; attempting to change it can make the system unusable.
Assuming the change renames or moves the drive: A drive letter is a path label. To change the descriptive name shown in File Explorer, use the volume label instead; to move files, copy them separately.
Ignoring apps and shortcuts: A shortcut to E:\Folder will not automatically point to the same files after the drive becomes F:. Update references that use the old path.
Removing a letter by mistake: “Remove” hides the volume from ordinary File Explorer browsing; it does not free up space or erase the data. Use “Change” to assign a different letter.
Changing a drive during active work: Files in use may fail to save or become unavailable to an application. Close programs first and wait for file transfers to finish.

Tips

Choose a letter that is not assigned to another drive and that you can recognize later. Windows commonly uses C: for its system volume, but other assignments vary.
If a removable drive keeps receiving different letters, first check whether another device or network location is claiming the letter you want. A fixed assignment can help, but Windows may not be able to use it while that conflict remains.
Changing a letter is generally a reversible assignment: repeat the Disk Management steps and choose an available letter. Reversal will not automatically repair software paths changed in the meantime.
Keep a note of the old and new letters if the drive is used by a backup tool, game library, or work application.

Troubleshooting

The drive does not appear in Disk Management

Check that the device is connected, powered on, and detected by Windows. For an external drive, try another cable or port if appropriate, then reopen Disk Management. Do not choose “Initialize disk” or format the volume simply to make it appear; those actions may put existing data at risk.

The letter I want is unavailable

Choose a different unused letter, or identify what currently owns the desired one. A USB device, card reader, mapped network location, or another volume may be using it. Do not remove a letter from a volume unless you know what depends on that path.

The Change option is unavailable or Windows shows an error

Make sure you selected a volume that supports drive-letter assignment, not an unallocated region or protected system partition. Close apps using the volume and retry with administrator permissions. Some special, encrypted, or system-managed volumes may not allow the usual change.

The drive opens, but an app cannot find its files

Use the app’s own settings to browse to the folder under its new letter, or edit the affected shortcut or script. If the app manages a library or backup destination, update its saved location rather than moving or deleting files.

The drive is missing from File Explorer after the change

Return to Disk Management and check whether the volume still appears and has a letter. If it has none, use Change Drive Letter and Paths and select Add. If the volume shows an error or asks to be formatted, stop and avoid formatting until you have checked the drive and protected any data.

Frequently Asked Questions

Will changing a drive letter delete my files?

No. Changing the assigned letter does not normally erase or move files, but applications and shortcuts that use the former path may stop finding them. Back up important data before changing drive settings.

Can I change the letter of my C: drive?

You should not change the letter of the Windows system or boot volume. Windows components and installed programs depend on their expected paths, and changing them can prevent the computer or software from working correctly.

Can I change a USB drive’s letter?

Yes, if Windows shows it as a volume that supports letter assignment. Use Disk Management, and remember that changing the letter can affect files or apps that refer to the USB drive’s previous path.

Can two drives have the same letter?

Not at the same time in the same Windows setup. Select a letter that is not already assigned; if the desired one is occupied, resolve the conflict or choose another.

Does changing a drive letter change its name?

No. The letter is part of the drive’s path, while the name is its volume label. You can change the label separately in File Explorer without changing the assigned letter.

Further reading: Microsoft Support. Details can change, so check the official page for anything that matters to you. Spotted a mistake? Tell us. How we write an answer.