
That's where the drive letter was - it had taken the assignment, but without an iso mounted, it didn't show up in drive management.

In my case, it turned out I have software running that mounts iso files as CD drives. Click 'Yes' if you are ready to format the drive, and wait the formatting to complete. Choose a suitable file system for the volume and click 'Format' button.

They already were, if you read carefully) In DiskGenius, right-click the volume whose file system cannot be recognized by Windows and choose 'Format Current Partition'. I saw a LOT of this while I was researching this problem - I could tell that the person asking the question was saying that the letter wasn't in the list, but the person trying to help would just point them towards drive management (where

The problem was that the drive letter I needed wasn't in the list.Ī note for anyone who reads this in the future who does support - when working with someone who says "a drive letter is missing" make sure to understand if they mean the drive doesn't have a letter assigned, or if the problem is that the letter they need
