I need some help with theater mode...

I own an Xbox 360 Slim with 4GB. There is a 16GB USB plugged into my Xbox 360. I’ve done some poking, and a lot of people can’t play War Games(if this is just a REACH problem, then Firefight) and Co-op Campaign. I store all Halo 4 files on my USB, and everything works like a charm. I just have a problem with Theater Mode. It’s the usual for all Slim users. “One or more players do not have an Xbox 360 Hard Drive(HDD). Films cannot be viewed without an Xbox 360 Hard Drive.” I know it should’ve been obvious since I own a Slim, but I still think there’s a solution. If I move all of my Halo files(Save Data, Multiplayer Data, War Games, and Spartan Ops.) to my Xbox Storage, will Theater Mode detect the files and record films? Forge, War Games, Spartan Ops and Co-op Campaign all work, but I’m curious as to why Theater mode doesn’t work. If anyone has an answer, or if 343 can look into it, let me know. If no one has an answer, then I’m going to get a new hard drive.

Thanks for reading!!

you need a hard drive (the 4GB doesn’t count because it’s flash memory, not HDD)

Microsoft sells them separately, you can find them easy (be sure it’s a Xbox 360 SLIM hard drive)

I should mention that you don’t need to get the biggest HDD, just what you think you may need.

Thanks for helping me out here.