I've been using a PC with M-Audio Delta 1010LT for audio recording, and I've decided to sell all of that stuff and just use my iBook. I'm planning on getting a MOTU UltraLite. My issue here is hard drives. I have a 200GB external HD, but it's in a USB enclosure. I don't really want to use the iBook's hard drive because it doesn't have that much space left on it and I believe it's only 4200 RPM. Would I be able to do up to 8 tracks of recording using a USB external hard drive, or would the USB not be fast enough to handle all that data at once?