I have a new Mextor external drive. I installed it on my laptop and my desktop. When installed, XP isaw the drive on both machines, it showed it as Drive "F". I transfered data back and forth to and from the drive, it worked flawless.
After I shut down both machines and came back the next day tp perform a backup, I plugged the USB in, windows recognized it, but when I went to my computer you could not find the drive, this happened on both machines. I rebooted and the same thing happened.