Hello- I want to buy an external hard drive to back up my music and my personal music recordings as well as pictures, etc. I bought a western digital that I had to return. I need it to be pc/mac compatible but my mac is an OSX 10.3.9 The one I bought was only 10.4.11 or above. I would like to have it USB powered so I can bring my music collection places & just plug into a system. Don't want to spend much over $100. Is this possible? Help. Oh yeah- my pc is Vista and I've got a lot of music I want to put on the new hard drive from my Mac. Thanks