Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This enclosure is Junk

I bought two of these and installed a 2TB drive in each one. I use them for Time Machine backups on a 2010 Mac Pro running OS X Lion.I was getting a complete system lock-up with spinning beach ball about once a week. I finally figured out today that it is these junk drive enclosures. Apparently it fails to spin up and the OS locks up while it tries to access the drive.Worst enclosure ever. Better go buy a OWC enclosure, which is a little more expensive, but they are reliable.