Gigabank Premier 80

I bought an “I/O Magic Gigabank Premier 80GB Portable Storage Drive” last night. It’s an 80 GB USB powered external hard disk that’s pocket sized. It was about $100, and I’ve read mixed reviews online. Some people seem to like it. One person said that after accessing it for 30 minutes, it gets write failures. Another person said he used it extensively everyday for 10 months, and it worked fine until that time at which point there was a loud noise and it stopped working completely. So far, it’s worked fine for me. I’m not sure if I should keep it or return it.