I know it's been mentioned before on this site, and it was the first result when I googled that question, but that post was 2 years ago, and it didn't say how, just if it was possible.
Okay, so I got all 4 of the Black Ops DLC a while back, and that Xbox got Red Rings, so I used a hard drive transfer thing to get them on a USB. My old Xbox was 8GB, and my new one is 4GB so I can't put all my games on it. How EXACTLY Do you play game DLC Off of a USB? Black Ops to be specific. And NO! I didn't just ask, I tried too! I went onto Black Ops, went to Zombies, and none of the maps were there, just the default 3.