I have a 2TB Seagate external USB drive. Until recently I could access the files and folders saved on it via my Dell Windows 10 computer. Now when I plug it in, the file explorer sees that the drive is there, but only recognized the free space - not the used space. When I try to access the drive, it gives an error something like drive path inaccessible, hardware fault. (I don't remember the exact words and can't repeat it at the moment as I am scanning the drive for problems.) Using a Seagate troubleshooting tool, I have not found nothing wrong with the drive but am running an extended test right now. The Windows Device Manager show it to be ok, but when I try to open the Windows Disk Manager, it fails to populate a list. If I unplug the drive, Disk Manager works fine. It also does not show up it the Windows Action Center when I plug it in. No box pops up asking what I want to do with the drive. Could a reformat help the drive or is it something else? Is it something else entirely? Thanks.