Sorry for posting a new thread when I only have a few posts to my name already... ...and forgive me if this has been asked before (I looked and couldn't find anything, maybe I was just searching for the wrong keywords.). I purchased Mad Men seasons 1 & 2 from iTunes earlier this year. They are taking a pretty big amount of hard drive space because it is the HD and SD versions of the video files. I was wondering if I copied them to my external hard drive and then deleted the files from my computer if they would work properly in iTunes later on if I tried to re-watch them. I understand that the video files have DRM on them but I don't really understand DRM itself. I have already copied the files but I'm afraid to delete them from iTunes just in case they don't work. I would be out a lot of money on these two seasons. Any answers or help would be GREATLY appreciated!