The game says that I have 954mb of space and I've only used 260mb but I can't put any more maps on my file share can someone please assist me with this
I believe there was a limit for each type of file. Maps, Gametypes, Screenshots, Video Clips, etc. It's honestly been so long, I can't remember all the detailed specifics.
Update: According to Halopedia,you should be able to have 25 items in your file share for Halo Reach.