I upgraded my stock 160GB HDD on my Macbook pro 2.2 about a year ago to a 320 GB thinking that would be plenty of space. Of course I was bad wrong. I have less than 10 GB left. I have 2 options. Purchase a new 750 GB drive for internal. Or I can move my video media to the external drive (the old 160GB drive). My question is if I use the external drive, will time machine back it up? How would I tell iTunes to look at only the video from the external HDD and everything else internal? If that works then... Can I access both the external drive and internal from my Apple TV 2 to watch the videos? I can currently access my computer and stream media to the Apple TV 2 and it works very well. Any suggestions?