To restore the DataLocker back to factory default settings and delete all of the information from the drive, connect and unlock the drive. Then go to:
"Setup" --- "System" --- "Zeroize Drive"

This will wipe the encryption key from the drive rendering the information inaccessible. If you do not have the password to the drive and need to reset it, please refer to our article regarding the self-destruct mode for the drive: 

http://support.datalocker.com/support/solutions/articles/4000076325