If other computers detect the drive when you plug it in, but your current computer doesn't, it's possible there's a driver problem in Windows. To check for this, open the D… See more

If the drive appears in Disk Management and you see one or more partitions on the drive — with a blue bar along the top — it may not appear in File Explorer because it needs to b… See more

If you see the drive in Disk Management, but it says "Unallocated" — with a black bar along the top — that means that the drive is completely empty and unformatted. To format it s… See more

In some cases, the drive may have a very messy partition scheme. You may even see "protected" partitions that you can't delete from within Disk Management. Or the partition o… See more