Look, it's pretty clear that Battlefield 4 -- a game designed to sing on powerful PCs and next-gen consoles -- was always going to struggle on current-gen hardware. So if developers need to go to extremes to find a workaround, well, they gotta do what they gotta do.
The Xbox 360 version of the game comes with a mandatory 2GB install. Fair enough. Things get crazy with developer DICE's recommended course, though, the game's creators advising you to opt for a 14GB install.
Here's the official statement from the game's FAQ:
In addition to the required installation, each disc has additional content you can install to your hard drive for better performance.
- The Multiplayer Disc, or Disc 1, has an additional 6.6 GB of content
- The Single Player Disc, or Disc 2, has 5.8 GB of installation content.
We highly recommend performing these additional installations to make sure you have the best experience possible in Battlefield 4.