Synology NAS DS720+ Hardware Installation Manual page 10

3 Insert the loaded drive tray into the empty drive bay and push it back until you hear a click when the tray is
locked into place.
4 Repeat the steps above to install the other drives you have prepared.
5 Drives are numbered as shown below.
Note: If you plan to create a RAID volume, we recommend installing drives of identical size to make the best
use of drive capacity.
10 Chapter 2: Hardware Setup