I have been ripping all my DVD's to my MacBook but when I move them to my NAS it also adds some extra files that can't be seen in finder on the mac so I can't remove them as they only show up on my blu ray player and my Xbox. Anybody know what they are, how I can stop them from being added and how to remove the ones that are already there? It's the first files in the folder that start with ._ This is how they appear on my blu ray player. And on my MacBook. Any help would be great thanks.