Disassembling the Xbox 360 HDD unit
The Xbox 360's HDD unit only currently comes if you purchase the $399 Xbox 360 system. For those who purchase the core system, no hard drive is included. However, if you are interested in finding out just exactly what Microsoft has offered in terms of storage, the following are instructions on how to disassemble the Xbox 360's HDD module.Start off by first removing the HDD unit from the Xbox 360 main console and lay it flat with the connector side facing upwards. You will see 3 screws. The 4th screw is located underneath the silver "Microsoft" sticker -- removing this sticker instantly voids your HDD unit's warranty.
Once you have removed all 4 screws, lift up the plastic cover while being careful that it is latched onto the button-release end of the unit. You'll want to be careful as not to pop the spring loaded