Exterior
The plastic enclosure doesn't look nice since this is an expensive NAS. Plastic also doesn't conduct heat as well as metal. Synology used good quality plastic, but we would definitely prefer a metal case instead, ideally one with a brushed finish.
At the front are several LED indicators, a USB 3.0 port, and the power on/off button.
You have to remove the plastic bay cover to gain access to the HDD trays out of plastic.
We removed the trays to take a photo of the HDD area. As you can see, the fans are installed right behind these trays, which allows them to efficiently rid the HDDs of any heat they produce.
The trays are made of plastic and their quality isn't good enough for such an expensive NAS. The lack of any sound-absorbing material is definitely a downside. In addition, lockable trays are preferable in a business environment.
Synology's logo on both sides also acts as a ventilation grill.
At the bottom of the NAS are four rubber stands, which secure it in place.
Most I/O ports are around the back. You will find a detailed description of them (courtesy of Synology) below.