Synology DS923+ Review: The Zero-Subscription Storage King

The email lands on a Tuesday morning: your cloud plan is going up again. You scroll down, do the arithmetic you’ve been avoiding, and realise you’re paying a monthly rent on photos you took, files you made, a life you already own. Miss enough payments and the door to your own memories quietly locks. You’ve never actually owned the thing you fill every single day — you’ve only been renting the shelf.

The short version: The Synology DS923+ is a four-bay network-attached storage (NAS) appliance, around $599, that keeps your files on hardware you own instead of a cloud you rent. It runs Synology’s mature DSM operating system, includes Active Backup for Business at no extra cost (most rivals charge for this), scales from four drives to nine via a DX517 expansion unit, and lets you control the encryption, the access, and the off switch. The honest caveat: it has no GPU, so it’s a poor fit for on-the-fly 4K Plex transcoding, and at $599 it costs more upfront than a basic QNAP or Asustor. You pay once. Then a decade of cloud subscriptions simply stops.

What is the Synology DS923+ and who is it actually for?

A NAS is just a small computer full of hard drives that sits on your home network and serves your files to any device you own — without ever uploading them to someone else’s building.

The DS923+ is the four-bay version of that idea, and the reframe worth holding onto is this: a cloud subscription rents you access to your own data; a NAS ends the rent. The villain here isn’t a bad actor — it’s the subscription machine itself, a business model built to milk a recurring fee out of files you created, with a vendor lock-in trap that gets more expensive to escape the longer you stay. Unlike Google Drive, Dropbox, or AWS, with a NAS you hold the hardware, you hold the encryption keys, and you hold the access logs. Nobody raises your price, scans your library, or locks you out for a lapsed card.

It earns its place for three kinds of people. Photographers and video professionals who need fast local storage for huge RAW files and exports. Founders and remote workers backing up client data and business files without paying per-seat SaaS fees forever. And anyone who simply treats cloud vendor lock-in as a structural risk they’d rather not carry. If you’re comfortable with a $599 buy-in and a little light maintenance, this is the least-friction path to genuinely self-hosted storage.

How reliable is the DS923+ hardware and software?

Reliability is the whole job of a storage box, so it’s the first thing to interrogate — not the last.

The DS923+ runs DSM (DiskStation Manager), Synology’s operating system, which has been refined for over a decade and is the reason IT professionals keep recommending the brand. The software maturity, not the spec sheet, is what you’re really paying the premium for. Underneath it sits an Intel Celeron N95 processor, support for up to 32GB of RAM (upgradeable), and two M.2 NVMe slots for caching the files you touch most. The chassis is about the size of a small printer and runs whisper-quiet on a shelf.

Synology publishes Mean Time Between Failure data per model, ships a 3-year warranty, and offers extended support plans. One honest quirk: the firmware sometimes flags third-party hard drives with a compatibility warning during setup. They usually work fine — it’s a nag, not a wall — but you should know it’s coming so it doesn’t rattle you mid-install.

What storage and expansion does the DS923+ support?

The unit ships with four 3.5-inch bays, empty — you choose your own drives, typically 4TB to 12TB each depending on what you’re storing. That’s a feature, not a gap: you buy the capacity you need and add more later instead of paying for a fixed cloud tier you half-use.

When four bays aren’t enough, the DX517 expansion chassis (sold separately) adds five more slots, taking you to nine drives. At nine 12TB drives that’s 108TB of raw capacity, before you subtract the parity that keeps you safe. For redundancy you’ll run RAID 1 (mirrored, simplest) or RAID 5/6 (more usable space, needs more drives). For most photographers and founders, RAID 5 with a spare drive is the sane middle ground — survive a drive failure without doubling your disk bill.

What backup and recovery comes built in?

Here’s where the price tag starts paying you back. Active Backup for Business is included at no extra cost, and it backs up your Windows PCs, Macs, and Linux servers straight to the NAS with no per-device licensing fee. Competitors routinely put this behind a paid tier.

What you get out of the box:

• Incremental backups — only changed files copy across, saving time and bandwidth.
• Granular file and application recovery, down to a single document.
• Version history, so you can roll a file back to an earlier state.
• Integration with external cloud storage (AWS S3, Glacier) when you do want an off-site copy.

You can also run Hyper Backup to make encrypted snapshots and replicate them to an external drive or a second NAS. That gives you a real 3-2-1 backup — three copies, two types of media, one off-site — which is the actual gold standard for not losing your data, and it’s the part most people skip until the day they can’t.

What are the honest limitations of the DS923+?

A review that only lists strengths isn’t a review, it’s a brochure. So here’s where the DS923+ disappoints.

• No transcoding GPU. Run Plex and ask it to transcode 4K on the fly and this box struggles — transcoding is CPU-bound and the N95 isn’t built for it. It handles 1080p in most cases. If you stream 4K to several remote users at once, look elsewhere.
• Premium price. At $599 it isn’t the cheapest four-bay NAS; a basic QNAP or Asustor runs $100–$200 less. You’re paying for DSM’s polish and app ecosystem, not raw hardware.
• Drive-compatibility nags. As noted, the firmware sometimes flags non-approved drives. Software friction, not a hardware fault — but real.
• Network-bound performance. Speed tracks your network. Gigabit Ethernet is standard; 10-gigabit is possible but means extra hardware on both ends.

How does the DS923+ compare to QNAP and Asustor?

The decision usually comes down to three boxes at three prices, so here’s the comparison straight.

| Feature | Synology DS923+ | QNAP TS-432P2U | Asustor AS6404T | |—|—|—|—| | Price | $599 | $499 | $449 | | Bays | 4 (expandable to 9) | 4 | 4 | | Included backup software | Active Backup for Business | Paid tier only | Paid tier only | | OS maturity | DSM 7.x (very stable) | QTS (solid, less polished) | ADM (newer, fewer apps) | | App ecosystem | 1000+ official apps | 500+ apps | 300+ apps | | Best for | Sovereignty + simplicity | Power users, cost-sensitive | Budget, basic backup |

The verdict: Synology costs more upfront but bundles the backup software the others charge for — so if you’re currently paying $10–$20 a month to Backblaze or Carbonite, the DS923+ pays for itself in under two years and hands you full control on top. Buy the QNAP if you’re cost-sensitive and comfortable configuring things yourself; buy the Asustor on a tight budget for basic backup; buy the Synology if you want it to just work and stay out of your way.

What does setup and daily life with the DS923+ actually look like?

The fear with self-hosting is that you’re signing up for a second job. You aren’t.

Setup runs about 30 minutes: slot in your drives, plug it into the network, power on, and open the Synology wizard in your browser. It walks you through RAID configuration, creating your admin user, and your first backups — no command line anywhere. After that, the box goes invisible. Your computers back themselves up on whatever schedule you set, and you reach your files through the web interface, a mobile app, or a mapped network drive.

Maintenance is a once-a-month glance at drive health (one click) and a firmware update when prompted, usually every few months. Most people forget the NAS exists until the day they need to recover a file — which is exactly how good infrastructure should behave.

Is the DS923+ really zero-subscription?

Yes — and this is the number that reframes the whole purchase. You pay $599 once. No monthly storage fee, no per-device backup licence, no subscription standing between you and your own files. Optional paid extras exist (extended warranty, enterprise licences) but nothing is forced on you.

Now line it up against the rent you’re already paying. Google One at 2TB is about $120 a year. Dropbox Plus at 2TB, roughly $144 a year. Backblaze, around $84 a year. Over five years, the cloud subscription alone can exceed $1,500 — for storage you never come to own. The DS923+ is a one-time investment that crosses break-even and then keeps saving, year after year, on hardware sitting quietly on your shelf.

Frequently asked questions

Can I access my files remotely while travelling?
Yes. Synology’s QuickConnect reaches your NAS securely from any device with no port-forwarding or DNS setup, and you can add a VPN tunnel for extra security. Speed depends on your home internet’s upload bandwidth, typically 10–50 Mbps on a home connection.

What happens if I lose power or my internet goes down?
Your files stay intact on the drives — nothing is lost. The NAS resumes when power and connectivity return, and any in-progress backups from your other devices simply pause and pick back up automatically.

How much electricity does it use?
Roughly 40–60 watts in normal operation, depending on your drives and workload. That’s about $50–$70 a year depending on local rates — far less than leaving a desktop PC running.

Do I need technical skills to run it?
No. If you can install software on a Windows PC or a Mac, you can set up and run this. The interface is built for non-technical users; advanced features like Docker containers exist but are entirely optional.

If a drive fails, is my data safe?
With RAID 1 or RAID 5, your data survives a single drive failure — swap in a new drive and the NAS rebuilds itself automatically. You’d only lose data if two drives failed at once in RAID 5 (rare), which is exactly why you keep that third copy off-site.

Owning your storage is the same instinct that runs through self-custody everywhere else — the Gnosis Safe review and the Ledger Stax review apply it to keys and coins, running your own Monero node applies it to privacy, and structures like the sovereign trust apply it to assets; the wider money-sovereignty library ties the thread together. Storage is just where it starts feeling tangible.

You started reading this because a price went up on something you’d already paid to create. That instinct — that you shouldn’t have to rent your own life back — was the right one. A NAS doesn’t make you a sysadmin or a prepper; it just moves the shelf into your house and hands you the only key. Set it up over one afternoon, and from then on your photos, your work, and your backups live somewhere no one can re-price, scan, or switch off. You stop being a tenant of your own data. You become the owner — which is what you always were, before someone talked you into paying monthly for it.