Newbie question for Apple TV. I know apple TV access's movies and music through itunes. So movies on my laptop hard drive for example have to be dragged into itunes and then sync'd with the apple TV. My question is - does iTunes take a copy of the movie and store it somewhere on my laptop or does it just reference it in its current location? In other words, If I have a movie file on my desktop and drag it into itunes so I can watch it on my apple TV is itunes copying the movie somewhere on my laptop effectivley meaning I have two copies on my laptop? If its just referencing it in its current location then is it possible to store all my movies on a network attached 1TB NAS drive and just drag the movies on it into itunes to get them into my apple TV? Thanks - just getting my head around the setup.