You can restore the system software to its default condition and delete all of the data in system storage.
Select [Format] > [Restore This System], and then follow the screens to complete the operation.
If this feature is restricted under 
(Parental Controls), you must enter the passcode.
Notices
- This operation will restore all settings and data in system storage and the internal memory card* to their default values. This operation cannot be undone, so be sure not to delete any important data by mistake. Deleted data cannot be restored.
- *
- PCH-1000 series systems do not have an internal memory card.
- Do not turn off your system during the restore operation. Interrupting the restore operation can cause your system to malfunction.
- Restoring the settings will not restore the system software to a previous version.