ok so far this is how I've been using the ATV... I have an external HD with all my movies. I'm only using the ATV for movies, and I am not streaming anything. What I do is have everything plugged in (usb from ATV,external HD, ATV is connected to TV thru HDMI, and im connected to network with an ethernet cable). I drag movies from external HD, while holding the option key, into the iTunes Library. After they are copied, I click on the ATV icon under the devices list where I have the 'custom sync' and 'show only synced items on apple tv' options checked. Then under the Movies Tab, it shows all the movies that I previously copied to the itunes libarary. This is where I check all the movies that I want synced to the ATV. Then I click apply and then itunes begins syncing. my question is, am I doing this correctly? and also, how come if I later do the same process to add another movie onto the ATV, and I uncheck the movies that were previously synced before, checking only the new movie that I want added to the ATV, when I unplug everything, why are all the other movies that I synced earlier then gone from the ATV? I know this is long and has probably been brought up a billion times, but I have not been able to find a thread that completely answers my questions clearly. any help is greatly appreciated.