I had an external hard dirve that I left plugged in when I re-imaged my computer. Now when I plug it into the computer it shows up in device manager, and in disk management. In disk management it has no letter and when I right click on it no options are there just “help” which pops up a help window that is no help at all. I was told the “file table” was messed up. Is there something I can do to reformat the drive?