I have a Seagate external hard drive that has suddenly stopped being recognized. I was switching it between computers yesterday quite often when suddenly the computers wouldn't recognize it anymore. I was not using the safe to remove option either. I have tried multiple computers with no luck. The device manager recognizes it and installs it in every instance but no drive letter is assigned so I can access it. I am assuming maybe the partition is corrupt but I have no idea how to fix it. Thanks in advance.