Why do we need a hard drive to view our perso

Why do we need a hard drive to view our person in waypoint. I know this isn’t a really big deal but I don’t have the money to buy one and I just don’t see the reason why we need to since you were able to with Halo 3 and Halo Reach, but why with Halo 4? What’s up with that? I’m just wondering because I know this isn’t a big deal but it’s still bugging me.

Just get an 8GB USB flash drive. Much cheaper than a HDD if all you’re looking to do is play Halo 4.