Cannot write gamer profile to Halo 4

Well I went to play Halo 4 this morning as per usual and I got a message when I started saying that it can not write my gamer profile because of low space on my harddrive. I have plenty of space on my harddrive and I don’t know what’s going on!

Please help!

I have found the problem, It is a corrupt profile. But now I need help in deleting my profile so I can recover it again. But I cant delete my profile because my xbox wont let me. What do I do?