Hi Dominic, I'm Graeme, an independent adviser here to help.
If you don't have any files you need on the drive, you can try reformatting it, which may fix the issue. This will remove all files that may be currently on the drive.
- Right-click the drive, then choose Format.
- Click on Quick Format, and after a few seconds the drive will be ready to use.
This should fix the issue, but if it doesn't, or you have important files on the drive, you might need to try plugging the drive into another PC to see if it works there.
Let me know how you go! Thanks!