If you have 8xxx Kernel, onboard 256 or 512mb memory on your console or it was manufactured after June 12, 2009 this item will be of no use to you....
In the Xbox 360, on-board NAND-flash memory stores important data like the hypervisor, kernel, and key vault.
Through installation of Cygnos 360, the onboard NAND-flash memory is complemented with another NAND-flash memory contained on the Cygnos 360 printed-circuit board. Being able to choose between both NAND-flash memories opens up a variety of new fascinating possibilities. The following list tries to give you an impression about what can be done with Cygnos 360: