NETGEAR ReadyNAS 102 Hardware Manual page 46

The tray handle pops out.
b. While holding the disk tray release latch, pull out the mounting bracket, slide the
bracket down the tray, and remove the bracket from the tray.
When the mounting bracket is partially removed from the disk tray, the disk tray
locking mechanism locks the mounting bracket to the disk tray. To unlock the
mounting bracket, push a pen through the locking mechanism on the side of the disk
tray.
6. Place the new 2.5-inch HDD or SSD in the disk tray.
7. Secure the HDD or SSD to the disk tray using the screws that came with your storage
system.
ReadyNAS OS 6 Desktop Storage Systems
Disks
46
Disk tray locking mechanism