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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 '13 at 18:31
    
@Bob: It could be that it only remembers drive letters after they have been assigned manually at least once. – grawity Jul 28 '13 at 19:57
    
Thanks! I have changed it a couple of times manually, but everytime it goes back to the old one. – Eshwar Aug 6 '13 at 14:42

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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