yea size. 3.5 vs 2.5. also the desktop external requires a power source while some portable external may only need a usb for power needs
Good. That shouldn't be a problem, then. I'll probably keep like 10GB of music on it just for listening when I don't have my external. What my external will really be for, is when I'm at, say, the band room after school working with the piano, drums, mics., et cetera, recording or composing, and need something to store all those files on without using up my IHD. So, in other words, I should have a place to plug it in and shiz. I plan on using a larger case and carrying laptop+AI+EHD+USB mouse in it, or getting a large backpack and using a case+laptop + case-in-backpack+other stuff-in-backpack. Either one.