I've got about about 100gb of TV Shows (not store bought), fully tagged as TV Shows with Season/Episode No. etc. I want to move them all to a external hdd to free up some space on my MBP. Whenever I've done this in the past it's always lost the Season/Ep No. metadata in the transfer (it kept the name/track/show name etc). How can I do this and guarantee it doesn't lose any metadata at all?