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I have an external hard drive that I connect often to my computer. At some point it was assigned letter G: and based on that my other software works.

Nowadays, suddenly it gets letter F:

Is there any way I can use a batch script to change the letter from F: to G:. I don't mind running the batch script manually?

If so, what is the code I should use and will it need administrative permissions?

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    See diskpart and yes you need admin. In theory it should have remembered the drive letter, consider changing it manually on disk management first.
    – Bob
    Jul 28, 2013 at 18:31
  • @Bob: It could be that it only remembers drive letters after they have been assigned manually at least once.
    – u1686_grawity
    Jul 28, 2013 at 19:57
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    Thanks! I have changed it a couple of times manually, but everytime it goes back to the old one.
    – gontadu
    Aug 6, 2013 at 14:42
  • I have noticed that it was remembered when I had one device using a drive letter. When I started using multiple devices with the same drive letter, they get forgot, I have not verified the hypothesis, but I guess Windows 10 remembers the last device assigned to a drive letter.
    – BtF
    Aug 2, 2021 at 8:56

1 Answer 1

Reset to default
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There are several methods:

  • mountvol – use it once to delete an existing letter, then again to assign a new one;

  • diskpart – interactive;

  • diskmgmt.msc aka Disk Management – a graphical tool.

Whichever you choose, assigning once should be enough, the assignment will be remembered afterwards.

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