EA has announced via the company’s help website that Battlefield 4 is not playable on the 4GB Slim model of the Xbox 360, despite the game requiring only a 2GB install. Apparently this is due to the data being unable to be saved on the console’s flash memory.
“Battlefield 4 cannot be installed and played on the Xbox 360 slim model’s 4GB internal flash drive without an additional hard drive with a minimum of 2GB of space available. Hard drives are sold separately for the Xbox 360 slim, Arcade, and Core models.”
The blog post also details the fact that USB storage is not an acceptable form of data storage either, instead only an official Xbox Slim hard drive being the preferred storage device, which can range anywhere from £30 to £70.
This doesn’t seem to be a problem on the 12GB PS3 which also has a flash memory.