I have the Toshiba 1TB External Hard Drive (Toshiba Automatic Backup Portable Drive) and have used it for about a year with no issues. Today, I went to retrieve something from it and suddenly my desktop can not seem to find it. I have Vista Home Premium and I have done what so many people have said to do. I can find it when I look at the device manager under disk drives but when I go to Computer>Manage> Disk Management, it is not seen. It seems a lot of people are having this issue and no one can seem to answer why it is happening. It is not the usb cable and it is not the TB drive because I can hook the external drive up to my laptop and it works. BUT I don't need the things that are on the drive on my laptop. I need them on my computer. They are things I need for work. Any help with this would be VERY appreciated by apparently, a ton of people who I see posting the same issue. Oh, I forgot to mention my laptop has windows 8. I don't think the different versions of Windows has anything to do with the problem though.