Why cant i save maps after making them

Games Halo 5: Guardians
1

Ill spend an hour or two making maps and ill try and save it but itll come up with not enough space even though i have nothing saved there please help

2

If you read the thread pinned, you will see that they have had issues for a while, and they are working on them. See here.

3

Relevant thread:

https://www.halowaypoint.com/en-us/forums/e0d9938206f04a598ce84f2c8cadce02/topics/regarding-ugc-in-halo-5-maps-modes-films/8387dc20-e62c-4227-b849-3421468c68e7/posts