Synology DiskStation DS214play Quick Installation Manual page 7

 For 2.5" drives: Remove the fastening panels from the sides of the drive tray and store them in a safe
place. Place the drive in the blue area (shown below) of the drive tray. Turn the tray upside down and
tighten the screws to secure the drive in place.
4 Make sure the side marked with "UP" is facing up, and insert the drive tray into the empty drive bay. You
should hear a click when the tray is locked into place.
5 If you have prepared a second drive, repeat the steps above to install it.
6 Drives are numbered as shown below:
7 Secure the drive bay cover to the front of the unit.
7 Chapter 2: Hardware Setup