*Just to add a note for future references:
I had the same problem, my game wouldn't create a game disc, I upgraded my computer and copied the exact same files from the older com and it created a game disc fine.
BTW: I have the same problem as you, my game is too big, 600mb is the smallest I can get it and that is by creating a game disc and compressing THAT file into a zip ( doing that only reduced the file by 2mb
). PM me if you find a solution and I'll do the same.