Xbox 360 Models with Most Storage: 250 GB (Slim) Max

Original Xbox 360 (2005): 20 GB (launch), later 60 GB.

Xbox 360 Slim (2010): 4 GB (common), 250 GB (max).

Xbox 360 E (2013): 4 GB only.

Summary

• Launch max: 60 GB (original)
• Overall max: 250 GB (Slim)

All models support external HDD expansion for more games/saves/media.