There are no drives in this NAS.  It is a 48TB max-capable version.

The front drive cover doesn't lock and I don't have the keys. This works great and I upgraded to a custom Unraid NAS. 

Here are the specs from the company website:

TS5800DN
 
TS5800DN2408
TS5800DN3208
TS5800DN4808
Desktop
 
2.13 GHz Dual-Core Atom™
2GB DDR3
 
8
24TB: TS5800DN2408 (8 x 3TB)
32TB: TS5800DN3208 (8 x 4TB)
48TB: TS5800DN4808 (8 x 8TB
SATA 3 Gbps
0/1/5/6/10/50/51/60/61/JBOD
 
2 x USB 3.0*
 2 x USB 2.0*
 
170W Max
Internal AC 100-240V, Universal 50/60Hz
41° - 95°F (5° - 35°C)
20 - 80% non-condensing
 
11.81 x 8.46 x 9.06 in
27.56 lbs
OP-HD1.0WR
OP-HD2.0WR
OP-HD3.0WR
OP-HD4.0WR
OP-HD6.0WR