Ok I have quite a situation on my hands.
So I downloaded a lot of map packs on my other account (We'll call it 'Account 1'). Later, Account 1 got permanently banned (for no reason), so I made a new account(Account 2). After making Account 2, I got a new xbox as my old xbox was very old and almost broken. Then on that new xbox I downloaded some map packs and those worked fine, but I missed all of my old maps from my first xbox and Account 1. I put all the map packs (which I downloaded using Account 1) onto a USB and put the USB in my NEW xbox and moved all the maps to the hard drive of my new xbox. However, when I go to play these old maps, they don't appear as an option on Black Ops, CoD4, etc., so I cannot play them. It's very strange because they show up on the memory of my Hard Drive yet I cannot play them. So I can't re-download them unless I pay because I purchased them on Account 1, which is now banned.