●Quick Erase: Erase HDD index table, and only takes A FEW SECONDS to complete. ●Full Erase: Erases the entire HDD. ●DoD Erase: Complies with U.S. Department of Defense erasure standards. ●Secure erase: A National Institute of Standards and Technology 800-88 accepted technique for properly purging hard drives. This method is supported by almost all modern SATA/SAS HDD.