I need to buy an external hard drive for my PB. The question is what should i put on it. I like having everything with me at all times. So when i travel its all their. I was thinking of getting the Lacie triple interface, 250 gig hard drive but what should i put on their... my music, my photos, movies? how do you handle your files with your external hard drive and traveling with your laptop? i mean i guess i could use my ipod to put files on.