The black color and relatively small dimensions for a 4-bay NAS make it suitable for any environment. The only thing that stands out is Asustor's logo on the front.


There are several LED indicators at the face of the NAS, along with a USB 3.0 port and power and copy buttons.


A single USB 3.0 port, 2.5 GbE port, and DC input socket are at the back.


Around the back, you will also find the power button, which is not very conveniently placed.


You will have to remove the top and side cover to install the drives.


A closer look at the SATA expansion card.


The power adapter's model number is DPS-90AB-3. It can deliver up to 90 W with 12 V output. It is made by Delta Electronics, one of the best PSU manufacturers. The AS3304T uses the same power adapter.