I'm going on a trip and ill have to leave my macbook pro in the hotel room.. since ill have to leave my macbook pro in the hotel room what I would like to do is have my programs/files run off of the macbook pro but store my data/pictures/important files on a Small/Light/Fast External HD.. when I have to leave the hotel I would like to bring it with me wherever I go.. this seems like the best option so far but I am open to other suggestions if anyone has any.. if not what kind of External HD should I be looking for? I'm looking for about 320GB+