Removing the drive trays from the N2310 is a simple task, and one that can be completed without tools. The lower portion of each drive tray - the parts that somewhat look like oversized LAN ports in the image below - are latches that release each drive from the housing and allow them to slide out of the front of the device.
The below left image shows the N2310 laying on its side with one of the drive trays unlatched and ready to be slid out. The below right image shows one tray about half way out of the N2310, while the other has been completely removed. Getting the trays in and out of the unit is quick and easy since it is tool-less, but installing hard drives to the trays does require screws.
The next two images show a pair of drives installed in the trays and being returned to the N2310 for use. Any 3.5" drive will fit the same way, but we'll be testing with a pair of 2TB Seagate Barracudas. Four screws hold each drive to a tray, and then you just slide it back in to the housing and secure the latch.
With the drive trays removed we can look down in to the N2310 to see a bit of the internal structure. Each bay has a SATA data and power connector attached to a green PCB on one side, while the other side is left open for the exhaust fan to draw heat away from the two drives.
