I wasn't sure what to search and from what I tried looking for, I could not find an answer as most migration tips were for Tiger: I've got my external hard drive set up with Time Machine on my 13" MBP w/ Snow Leopard and I need to upgrade the laptop already for my school courses (awesome ). When I get my new MBP, is it possible to plug in the hard drive with my previous backups and migrate everything to the new Mac? Will it appear as if my computer has just grown in size overnight, or do I need to manually transfer everything over? The hard drive is USB, I read somewhere about transferring all the files via Firewire but not USB, I'm guessing that's because of the backwards control you have with Firewire. (Not to mention slightly faster data rate). Any advice for the smoothest transition between Macs would be great!