Instruct: Classify Amazon reviews into positive or negative sentiment
Query: What a Dud!

We purchased this in April 2007 and by mid-2008 it had stopped working. An apparent power failure. After contacting the manufacturer we were told to send the whole unit back. Since we're not crazy about shipping our confidential data to "who knows who," we'll be purchasing a different backup system - not Western Digital -- ever.What a way to waste $230.