Change Drive Letter in Registry Editor

 1 Open Registry Editor (regedit.exe).

2 Navigate to the key below in the left pane of Registry Editor. (see screenshot below)

 HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

3 In the right pane of the MountedDevices key, right click or press and hold on the binary (REG_BINARY) value (ex: "\DosDevices\G:") for the drive letter (ex: "G") of the drive you want to change, and click/tap on Rename. (see screenshot below)

4 Rename only the drive letter part of the binary (REG_BINARY) value (ex: "\DosDevices\G:") name with an available drive letter (ex: "\DosDevices\F:") you want for the drive instead, and press Enter to apply. (see screenshot below)

5 When finished, you can close Registry Editor.

6 Sign out and sign in, or restart the computer to apply.