I currently have a windows computer with 3000 gigs of harddrive space (2 1.5 terrabyte hdd). Anyways, I currently keep all my mp3's and movies on the drive that doesn't have the operating system. I am considering switching to an Imac computer and was wondering if it is possible to set up my system where when I purchase music off of itunes it saves the files on an external hard drive that would be using the thunderbolt technology. Or am I stuck having the files download into an "itunes" folder on the "imac" itself. Basically, I'm lazy and don't want to have to back up or move files around unnecessarily if I can set up Itunes. Right now I only use Itunes to update os on my ipod touch.