Format a storage device
Important When you format a storage device, all of the information saved on that device is erased and cannot be recovered. Make sure that you either do not want the information stored on that device or have backed up the information to another device before you continue.
To format a storage device
Press the Guide button on your controller, go to Settings, and select System Settings.
Select Storage or Memory.
Select the storage device that you want to format, and then press Y on your controller.
Select Format. You will see the following message:
This will delete all content on this device. Do you wish to continue?
Select Yes to format the storage device.
If you are asked to enter your console serial number, do so, and then select Done. This step helps to guard against accidental formatting.
The console serial number is located on the back of the console and behind the oval door on the front of the console.