Right now i'm running a dell w/ XP on it and my hard drive is about 98% full, needless to say i need more memory and have began to search for a good external hard drive. None of that is too dificult, however in about 5 or 6 months i'll be getting ready to go off to college for which i will be getting a Mac. someone told my if i load up a hard drive off my dell i won't be able to use any of the pictures, music, etc. stored on it w/ my mac. I figured since macs are running intel chips now and can run XP (i do plan on running leopard) there shouldn't be any problem with the exchange. Who's right? Thanks in advance.