From the home screen, touch Settings > Device > Maintenance > Out of Service Erase.
Depending on the storage drive that is installed on your printer, do either of the following:
For hard disk, touch the Sanitize all information on hard disk check box, touch ERASE, and then select a method to erase data.
For intelligent storage drive (ISD), touch Erase Intelligent Storage Drive, and then touch ERASE to erase all user data.
Start the operation.