I don't have much money, and I need an external drive to use for backup. So I am going to just buy a cheap external enclosure, but for the actual drive, I was thinking of using a two year old Western Digital 160gb hard drive that was on sale at best buy two years ago. I put it in a computer I barely use and there is nothing on it, should I buy a new drive, or just use that one? I have written/read from that drive only a few times a month since then.