I have a Toshiba hard drive that used to work perfectly. I have a lot of things stored on it and I got a larger HD so I wanted to transfer everything. I plugged my old HD into my laptop and to the other 5 computers in the household and they all detect the new hardware but it doesn't show up under My Computer on any of the computers that I've tried. It shows up under my Device Manager but not under Disk Management. I tried to change the letter assigned to it for the drive but under my Device Manager it shows up as a Mass Storage Device. If I could format it I wouldn't want to because of all the extremely precious things that are stored on it. Please someone help me! I don't know what to do. I'm running Windows XP.. the HD is in a separate USB casing. I'm at my wits end! Help!