Guys, if you stick those drives in a different computer, do they work? Just trying to figure out if the problem is the drive itself or the USB ports on the computer.
My Cowon MP3 player gave me errors like that from time to time on the old PC, where I had USB 1.1 native ports from the mobo, as well as USB 2.0 ports provided by a Startech PCI card. It happened only with the 2.0 ports. Those ports did work all right with external hard disks though. The player works fine in my new PC where the USB 2.0 is native. Maybe different devices implement USB 2.0 differently and there are incompatibilities.