A question about portable external drives. I'm looking to transfer things from my old iBook G4 to a new Macbook Pro,....which by the way is a Beautiful machine. As I read about these drives, it many times seems to insinuate that I might not be able to select items to both transfer or later back up,...is this really the case? Can anyone help clear up any misconceptions I may have built up reading the plethora of product reviews. Also, I am running Snow Leopard and I don't often see a full compatibility with SL mentioned. Very much appreciate any help in this,...tired of reading....wanting to buy!!