Details for 722K unit... 622 is probably similar 1. purchase proper hard drive and unplug unit 2. remove 4 case cover screws on back of unit 3. remove cover 4. pop off
front panel by depressing front panel clips and pushing panel away from front 5. remove hard drive bracket screws front, side, rear and unplug hard drive 6. install new hard drive, drive bracket, and attach hard drive...