Approximately 7 GB of a 60 GB drive is reserved for system use (4 GB of that portion is reserved for game title caching and other hard drive specific elements in games that support the hard drive, and an additional 2 GB is reserved for use by the Xbox 360 backwards-compatibility software). This leaves just under 54 GB of free space, rounded down to 53 GB in the dashboard, for saving game files, Xbox Live Arcade downloadable content, and media files (such as music and video). Similar figures apply to other hard disk drive sizes.