How much space does MGS4 really use on the BluRay Disk?

[d21lewis]

Otacon says: "Snake it's time to put in disc two. Can you find it?"

Snake says: "Eehum?"

Otacon says: "Wait this is the XBOX 360! We're on disc 4!"

Snake says: "Meh. Get a grip Otacon."

Game continues......... XD