I currently have a factory 160GB harddrive which I'd like to replace with a new Western Digital 500GB Scorpio Blue I just purchased. I'd like to be able to clone the data on my present drive to the Scorpio and get up and running as soon as I install it. I've already downloaded Bombich Carbon Copy Cloner. 1. Which type of external casing should I get for the Scorpio. Is USB ok or do I absolutely need Firewire? The FAQ on Bombich says that if I want to boot from the external enclosure, I need to buy an enclosure that'll boot OS X. Does this apply if all I want to do is a block level clone and then put the Scorpio straight in to the Mac or can I just use any old enclosure? 2. Do I need to format the Scorpio at all before doing a "backup everything" clone using CCC, or will CCC take care of that for me?