im really confused right now. when i purchased battlefield 3 for the xbox it came with back to karkand for free, but recently i bought premium which includes all the dlc without needing to download it, does this mean i can remove the back to karkand expansion from my hard drive or is it still required to have it to play unlike the other dlc? hope someone can help me with this because im stumped.

EDIT: also does anyone know if i can delete any of the old patches that were like 2 gigs

I think you can remove the Rent a Server update, I heard it actually creates problems for the newer version of the game.