I have a 4TB WD red drive that started acting odd. It seemed to be gobbling up space, the drive said it was full, so I would delete 20-60GB and after downloading 10-20GB the drive would be full again.
If your Hard drive does not show up on the boot menu in Windows 11/10, you can try our recommended solutions below, which are listed in no particular order, and see if that helps to resolve the issue.