Hey All, I was wondering if anyone had any thoughts or preferences on a good 500gb (or more) portable hard drive for Time Machine on my Macbook. I need it to be portable because I travel quite a bit. I have been looking at the Seagate FreeAgent Go 500 GB USB 2.0 Portable External Hard Drive ST905003FAA2E1-RK but I can't tell a) if this will work for my macbook and b) if it will work for Time Machine. Any thoughts or recommendations? Would any portable hard drive that I buy on Amazon work for Time Machine? Thanks!