Ok so my xbox broke a while back and I had my friends xbox for about 3 weeks while I was waiting for my new xbox to come in. So while I had my buddies xbox I bought GTA V off of the marketplace and saved it to two 16gb flashdrives. So now that I have my new xbox I recovered my GT onto this new xbox and plugged in the two flashdrives but when I try to play GTA V an error pops up saying the disk is unreadable. But there is no disks! its all saved on the flashdrives! Has anyone had this issue before? and if so how do I fix it? I really don't want to have to download the whole game again it took forever.

Thanks!