This isn't a massive problem for most NAS owners who only have 1Gb networks but is something to note if you plan on upgrading your LAN infrastructure. The issue with the DS420+, like the DS220+, is the lack of any 2.5Gb ports. Because we're looking at an additional two bays, Synology included an extra fan, which means the DS420+ runs cool, and you barely notice any noise. If the DS220+ isn't quite good enough for your needs or simply seek something with a little more functionality, the DS420+ is a great step up and takes our runner-up spot. Then there are the smaller differences, like the addition of M.2 SSD cache support and an eSATA port. This NAS also has four bays instead of two.

Instead of the front plate, you've got full access to the drive bays without having to detach anything. The Synology DS420+ is essentially the same as the DS220+, but with a few notable differences. The included app store allows for a whole host of services and third-party apps to be downloaded and installed. It's brilliantly designed, acting much like the OS you use daily on your computer. So the hardware is pretty good, but what makes Synology our top recommendation against competing vendors is the DiskStation Manager (DSM) OS. It would have been nice to see 2.5Gb ports here, but being able to link the two 1Gb ports up does help. On the rear, you'll find the two USD 3.0 ports, as well as two 1Gb LAN ports. You've got a front panel that covers the drive bays, resulting in a cleaner look. This is more than enough for most NAS owners who are new to the market, and the 2GB of non-upgradable DDR4 RAM is brilliantly matched to the Intel Celeron J4025 processor.

This enclosure has two drive bays, allowing for up to 32TB of data to be stored. The best overall NAS from Synology is the DiskStation DS220+.

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