D-Link ShareCenter DNS-320L User Manual page 282

Section 4 - Configuration
To activate the camera you would like to use for backup, check the box
next to the camera's name.
Click Save Settings to finish. The Archive table at the bottom populates
after you save the data.
A pop-up message confirms the new backup was added successfully.
Click Yes to continue, and the DNS-320L will begin to backup the IP
camera recordings.
D-Link ShareCenter DNS-320L User Manual 276