I just got an Apple TV and have purchase a couple of movies from the iTunes store. I also have a lot of Blu-rays that have the digital copy of the movie included. The problem is these movies take up a lot of space on my 500GB internal MacBook Pro drive. Is there any way that I can store the movie files on an external drive, preferably on that I can connect to my Airport Extreme, and be able to access them on my Apple TV? I don't want to move my entire iTunes library (music and all) off of my MacBook, just the huge movie files. Any suggestions?