Hello. I have some questions about 1TB external drives. 1. For time machine (will backup my 160gb internal and two 250gb externals), is FireWire any useful or should I use USB? 2. What is the best/cheapest 1TB external drive from a local store (no online store) in Orlando? 3. Many 1TB external drives are really two 500gb drives with one USB cable to connect to your mac. When I connect this type of drive, will it show as one drive or two drives (if so, how can I make it show as one)?? Thanks.