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Synology DS918+ review: An intuitive NAS with serious potential to expand

Synology DS918+ review
Our Rating :
£518.18 from
Price when reviewed : £505
inc VAT

Not the fastest, but this feature-packed NAS makes a brilliant addition to any home or office


  • Elegant design
  • Very quiet
  • Vast selection of apps


  • Slightly disappointing raw file-transfer performance

If the DS218 and DS418 reflect the value side of Synology’s latest lineup, the DS918+ sits at the performance end. While those two are powered by quad-core, ARM-based Realtek processors with just 2GB of RAM, this high-end model has the quad-core Celeron J3455 and 4GB ready to go. 

Synology doesn’t go in for LCD displays or gleaming LED status bars, and instead simple indicators tell you what’s going on with the NAS and the hard disks. Nor does it go overboard on connectivity, with a single USB 3 port at the front and another one at the rear, along with dual Gigabit Ethernet ports. Yet there’s something elegant and functional about the design of the DS918+. The four caddies slide out easily and you can add and remove drives in seconds, with the clips that hold them in place working perfectly. In general operation, it’s a very quiet and unobtrusive NAS.

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It’s expandable, too. Turn the unit upside down and remove the covers and you can fit up to two NVMe 2280 M.2 SSDs, which the NAS will use as a speed-boosting cache. Remove all the drives and you can get to a second SODIMM slot, enabling you to boost the 4GB of preinstalled memory up to 8GB. There’s even an eSATA port on the rear to connect an extra hard disk or SSD, not to mention Synology’s own five-bay DX517 expansion unit. This takes the maximum capacity from 48TB up to a staggering 108TB.

The DS918+’s beefed-up specification makes a tangible difference when you’re running more intensive apps, and if you want to take full advantage of Synology’s app ecosystem, the DS918+ is definitely the NAS to buy. Install Synology Drive, Synology Chat and Synology Office and you have a workable alternative to Google’s G Suite that’s suitable for a small team, except here it’s running on in-house hardware rather than in the cloud. Sure, the feature set of the office apps is limited in comparison to G Suite’s Docs, Sheets and Slides, but if you’re after privacy and control it’s a compromise you may be willing to make.

Elsewhere, you get all the benefits of Synology’s DSM OS, including simple, browser-based setup and configuration, as well as a vast selection of apps. Individual shares can be protected with hardware-based 256-bit AES encryption, and the software supports two-step verification to prevent unauthorised users from logging on. Synology’s Hybrid RAID (SHR) technology offers a different, more flexible approach, enabling you to create volumes from disks of different sizes, with an effective balance between maximum capacity and RAID redundancy.

You can connect the DS918+ to Amazon S3, Dropbox, OneDrive, Box and Google Drive, run virtual machines or Docker containers, use it as a security PVR with Surveillance Station or set up a WordPress or Joomla CMS. And while it doesn’t have the HDMI outputs or add-in apps to function as a media player or moonlight as a desktop Linux PC, its media server capabilities are hard to fault, down to streaming and transcoding 1080p and 4K video content on the fly.

At times, Synology seems to be trying too hard to replicate every cloud-based service on a NAS drive, and we can’t really see the point of the slick but vapid Moments photo manager and streamer, but the polish of its apps and their user interfaces is in a different league from its rivals.

If the DS918+ falls down anywhere, it’s raw file-transfer performance. Don’t get us wrong – this is a speedy NAS, particularly when it comes to sustained file transfers of large media files – but it’s not as adept at handling lots of smaller files as the Asustor 6404T, the Netgear ReadyNAS 422, or even the less expensive Thecus N4810.

Synology DS918+ review: Verdict

How much performance matters depends on what type of NAS you want. If you’re buying for business rather than home, this is the best package, and the same goes if you’re more swayed by Synology’s Google Drive-like features than Asustor and Qnap’s media player skills. This is a powerful, intuitive NAS with serious potential to grow.

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