20GB/60GB/120GB/250GB/320GB/500GB HDD Hard Drive Disk For Xbox 360 Slim/Xbox 360 E Console Hard Drive For Microsoft XBOX360 Slim Juegos Consola
-Download movies and television shows from for Xbox Live Marketplace
-Play original and retro games in for Xbox Live Arcade.
-Because the drive stored some system files, the available space would be less than 320GB.
but the operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB.
so there are some differences between display capacity and nominal capacity of hard disk products.
However, this is allowed to exist. Please do not doubt his authenticity.
40 GB=about 37GB
60 GB=about 55GB