Answer: format
Explanation:
CHUCK THAT HARD DRIVE DUDE!!!! THROW IT INTO THE OCEAN!!!!
in all seriousness,
The multifunction device's hard drive should be removed from the device, connected to a computer, and formatted safely using several wipes to ensure complete erasure of sensitive data. If this is not possible, and replacing the drive with a new one is not possible either, then the device's interface should have settings which gives the option to format the drive.