A “drive letter” is the letter that precedes paths to files on that drive. For example, C:, D:, E:, etc. Windows lets you change the drive letter of hard drives, USB flash drives, DVD drives, or other drives attached to your system if so desired. These instructions work on Windows XP, Windows Vista, and Windows 7:

  1. Close out any programs that are using the drive whose letter you want to change
  2. Click the Start button
  3. Right-click “Computer” or “My Computer”
  4. Click “Manage” from the popup menu

  5. If a User Account Control dialog appears, click “Continue”
  6. Click “Disk Management” under “Storage” on the left
  7. In the list, find the drive whose letter you want to change and right-click on it
  8. Click “Change Drive Letter and Paths…” from the popup menu

  9. Click the “Change…” button

  10. Select a new letter from the dropdown

  11. Click OK
  12. A dialog will appear warning you that programs that rely on drive letters (e.g. your backup software, if you’ve told it to backup certain drives) may no longer work. Click “Yes.”

  13. If you didn’t complete step 1 (closing out programs using the drive), you may get this warning:

    The volume is currently in use. If you continue, the new drive letter will be assigned, but you can still use the old drive letter to access the volume until you restart your computer. The old drive letter will not be available for assignment until you restart.

    If you know what program is using the drive, click “No,” close the program that’s using the drive, and repeat these steps. Otherwise, click “Yes” and restart your computer.

  14. Close the “Computer Management” window
  15. Click "Start," click "Computer" or "My Computer," and view the Computer window’s drive list to confirm that the drive shows up with the new letter