Question: is 20gb enough for xbox 360?
Answer: With install sizes from 4 to 8 GB, no. But you don't have to install anything. You can play any game regardless of HDD size. ... The 20gb HDD for Xbox 360 actually is more like 13gb of free space for your own use, and most game installs are 4 to 8gb so that ends up at 2/3 games installed to the hard drive at one time.