Available here is a brand new Xbox 360 250GB Hard Drive ( HDD) to suit Xbox 360 Slim consoles. This 250gig HDD includes 12 month warrantee and allows you to upgrade the storage space of your XBox 360 Slim console. The XrossMediaBar ( pronounced " CrossMediaBar" or " cross- media bar" and officially abbreviated as XMB) is a graphical user interface developed by Sony Interactive Entertainment. The interface features icons that are spread horizontally across the screen. Navigation moves the icons, instead of a cursor.