Simpletech. I had one of those. It constantly becomes unrecognized and you have to unplug it and reattach. "I" tried everything. Or maybe just turn off and on. Also if it is on while I start computer, the thing hangs at windows flash screen and I have to reboot.
I took it apart and used the drive in my new build until prices come down. SATA 2 1 TB. No probs. And when I want to transfer files, I put it back in the Simple case and use as an external.
Had I know this I would not have bought it. Lots of references to this same prob.