This video will demonstrate the replacement procedure of a Hard Drive for the PowerEdge R720XD.
Removing A Hard Drive From A Hard-Drive Carrier: Remove the screws from the slide rails on the hard-drive carrier. Lift the hard drive out of the hard-drive carrier.
Installing A Hard Drive Into A Hard-Drive Carrier: Insert the hard drive into the hard-drive carrier with the connector end of the hard drive toward the back. Align the screw holes on the hard drive with the set of screw holes on the hard-drive carrier. When aligned correctly, the back of the hard drive is flush with the back of the hard-drive carrier. Attach the screws to secure the hard drive to the hard-drive carrier.