Lexmark XC8160
From the home screen, touch Settings > Security > Disk Encryption > Start Encryption.
Note: Enabling disk encryption erases the contents of the hard disk. If necessary, back up important data from the printer before starting the encryption.
Follow the instructions on the display.
Notes:
Add a hard disk to increase the printer memory capacity and job storage capability.
Delete residual confidential information left by scan, print, copy, and fax jobs.