I've spent a good part of the day trying to copy my Macbook's startup disk onto a 160GB Seagate 7200.2 SATA2 160GB 2.5" drive in a StarTech InfoSafe USB 2.0 SATA drive enclosure. I bought the drive (a pair of them actually - one for the laptop, the other as a backup drive) from Generic Technology, definitely my favorite little computer store in Vancouver. They have great prices, actually know what they are talking about (surprisingly rare these days), are always friendly and responsive, and go the extra mile (take returns without a fuss, spend time to help with troubleshooting, call back promptly).