Synology DS225+ Review: Is It Right for a Home Office or Small Business?
Dated hardware, a real 2.5GbE upgrade, and the same excellent software Synology is known for.
By John Hall — TechODash | Last updated: July 2026
Quick Verdict
The DS225+ is a modest hardware refresh of a well-understood design. You're largely buying Synology's software, not a fast box — a reasonable trade for most small offices, and a poor one if you wanted 2026-class hardware for the money. A two-bay NAS sits between "data scattered across laptops and cloud accounts" and "a proper server." It gives you one always-on place on your own network for shared files, and one consistent destination for backups from every computer in the office. The DS225+ occupies the entry point of Synology's "Plus" line, where business-oriented software becomes available — Active Backup for Business, Synology Drive, Container Manager, and snapshot support on Btrfs volumes.
Why This Product Matters
Most home offices and small businesses end up with data scattered across laptops, external USB drives, and a mix of consumer cloud accounts. That arrangement works until a laptop is stolen, a drive fails, or someone needs a file that lives on a machine that's currently switched off. A two-bay NAS sits between those extremes — one always-on place on your own network for shared files, and one consistent destination for backups from every computer in the office. In a typical SOHO network, the DS225+ plugs into your router or switch, takes an IP address, and becomes the shared drive, the backup target, and optionally the private photo library and small camera recorder. It is not a replacement for offsite backup, and this review will keep returning to that point.
Who It's Best For
- Home offices and remote workers who want a private shared drive that doesn't depend on a monthly cloud subscription
- Small businesses of roughly 2–10 people who need centralized file shares with per-user permissions
- Anyone who needs a local backup target for Windows and Mac machines — Active Backup for Business handles whole-machine backups at no extra license cost, and Time Machine works over the network for Macs
- Families who want a private photo library and a place to keep years of documents without renting cloud storage
- Creators working with photo libraries, project archives, and finished video files, where the NAS is cold-to-warm storage rather than an active edit drive
- Small offices that want two security cameras recorded locally — Surveillance Station is included with two device licenses
- People who value a mature, well-documented interface over raw specifications
Who Should Skip It
- Anyone who wants NVMe SSD caching — the DS225+ has no M.2 slots at all
- Video editors who want to cut 4K footage directly off the NAS — a 2.5GbE link and two spinning drives are not an editing scratch disk
- Teams planning to run several virtual machines or a dozen containers — the ceiling is 6GB of RAM, and it ships with 2GB
- People who expect to outgrow two bays within a year or two — there's no expansion unit support; start with a four-bay model instead
- Buyers who judge on hardware value alone — the Intel Celeron J4125 is a 2019-era chip, and competitors sell newer silicon with more RAM and M.2 slots at similar money
- Anyone treating a NAS as their only copy of important data — a single box in one building is not a backup strategy
Key Features That Matter
2.5GbE networking: the meaningful change over the previous DS224+ — one port is 2.5GbE, the second remains 1GbE. If your router or switch supports 2.5GbE, large file transfers get noticeably faster; if not, it still works fine at gigabit speeds. Btrfs with snapshots: choosing Btrfs at setup enables scheduled, read-only snapshots of shared folders — the single most useful feature for a small business, letting you roll a folder back to yesterday morning after someone overwrites or encrypts a file. Active Backup for Business: included at no license cost, backing up Windows PCs, physical servers, VMware and Hyper-V machines, and Microsoft 365 or Google Workspace tenants to the NAS — for most small offices, the strongest reason to buy Synology over a cheaper competitor. Synology Drive: a self-hosted file sync and share service that behaves broadly like Dropbox on your own hardware, with desktop clients, selective sync, and version history. Hyper Backup: backs the NAS itself up to an external USB drive, another NAS, or a cloud provider — this is how you turn a single box into an actual backup strategy. RAID 1 / SHR: with two drives mirrored, one drive failure doesn't cost you data; bays are hot-swappable and tool-free. Third-party drives are allowed again: Synology's 2025 policy originally restricted new Plus models to its own validated drives — that was walked back with DSM 7.3 in October 2025, and the DS225+ can now create storage pools with standard third-party 3.5-inch HDDs and 2.5-inch SATA SSDs. WD Red Plus, Seagate IronWolf, and Toshiba N300 all work normally. Quiet and low power: roughly 10W idle and around 19–20 dB(A) in independent measurements — acceptable in a room you work in, though drive noise will dominate.
Performance and Reliability
Independent testing puts sequential reads around 282 MB/s and writes around 217 MB/s over the 2.5GbE port — close to what two mechanical drives can physically deliver, so the 2.5GbE port is doing its job; the drives are the bottleneck, not the network. In practice: copying a 20GB project folder takes a couple of minutes rather than five. Opening documents, streaming a movie, and syncing files feel instant. Working with thousands of small files — a Lightroom catalog, a code repository, a mail archive — will feel slower than a local SSD, and there's no NVMe cache option to soften that. The 2GB of RAM is the practical constraint, not the CPU — running DSM plus Synology Drive plus Active Backup plus a couple of containers will exhaust it. The single SO-DIMM slot takes a 4GB module for a 6GB total, and this is the upgrade to do at purchase time rather than later. One note on media: the Celeron J4125 does include Intel Quick Sync, and Intel-based Synology models are generally the ones that can hardware-transcode in Plex (which requires a Plex Pass for that feature), but Synology has retired its own media transcoding packages, and at least one review reports hardware transcoding disabled on this model. Coverage is inconsistent — if transcoding is a deciding factor, verify current behavior with your specific app before buying. On reliability, this design has a long track record — the chassis, thermals, and DSM stack are essentially the proven DS224+ platform with a faster network port. Synology backs it with a three-year warranty, extendable to five. Official maximum raw capacity is listed at 40TB, though independent testers have created pools with 30TB drives on this model under DSM 7.3.
Security Review
Synology's security tooling is genuinely good for this price tier, and it's the main reason the DS225+ is easier to recommend to non-technical buyers than a self-built alternative. What you get: Security Advisor, a built-in scanner that audits your configuration and flags weak passwords, open ports, and risky settings in plain language; two-factor authentication and Secure SignIn, including push approval, which materially reduces the risk of a stolen password becoming a breach; a built-in firewall with per-service rules, plus auto-block that bans IP addresses after repeated failed logins; AES-256 encrypted shared folders, hardware-accelerated by the Celeron's AES-NI support; Btrfs snapshots with immutable options, giving you a recovery path after a ransomware event on a client machine; QuickConnect for remote access without opening router ports, safer than the port-forwarding many people default to; and a real security response process — Synology publishes advisories and patches CVEs, with DSM 7.4-90075 shipping several security fixes. Where it falls short, honestly: a NAS is an internet-reachable computer the moment you enable remote access — every convenience feature you turn on expands the attack surface, and no vendor solves that trade-off for you. RAID is not backup, and snapshots are not offsite — fire, theft, flood, and a bad electrical event all take out both drives at once. The 2GB of DDR4 here is not error-correcting (non-ECC) — a minor concern for SOHO use, but a real difference from the DS725+. Default settings are convenient, not hardened — the admin account, default ports, and default sharing behavior all need attention on day one. Long-term support has an end date, and older devices eventually stop receiving DSM upgrades — plan on a hardware refresh horizon of roughly 7–10 years. DSM 7.4 adds an AI assistant (DSM Agent) and optional cloud-adjacent services — these are optional and didn't require linking an external AI account in independent testing, but review them before enabling in a business context.
First Settings I Would Change
- Create a named admin account and disable the default admin user — automated attacks target the default username first.
- Turn on two-factor authentication for every account with admin rights, before enabling any form of remote access.
- Choose Btrfs, not ext4, when you create the volume — this is a one-time decision at setup and cannot be changed later without wiping the volume; Btrfs is what enables snapshots and file self-healing.
- Run Security Advisor and work through its findings, then set it to run on a weekly schedule afterward.
- Enable auto-block and the firewall — a reasonable starting point is blocking an IP after five failed logins in five minutes, and restricting management access to your local subnet.
- Set up a snapshot schedule on your important shared folders — daily snapshots with a 30-day retention is a sensible default for a small office.
- Configure Hyper Backup to a second destination — an external USB drive rotated offsite, a second NAS at another location, or a cloud target. Verify a test restore rather than assuming it works.
- Set update behavior deliberately — enable automatic installation of security patches, but review major DSM version upgrades manually before applying them.
Setup Difficulty
Rating: Beginner to Intermediate — physical setup is genuinely easy: the trays are tool-free, drives slide in, and the initial DSM installation is a guided web wizard that walks you through drive setup and account creation in about twenty minutes. A first-time buyer can get to a working shared folder without help. The intermediate part is everything after — deciding on RAID versus SHR, setting up user permissions correctly, configuring remote access safely, and getting a real backup chain in place involves concepts most people haven't encountered. If you only want a shared folder and Time Machine backups, budget an evening. If you want per-user permissions, remote access, snapshots, and a tested backup routine, budget a weekend or an hour with an IT contractor.
Pros
- DSM remains the most approachable NAS operating system available, with genuinely readable documentation
- Active Backup for Business is included with no per-device licensing, unusual value for a small office
- Btrfs snapshots provide a practical, fast recovery path for accidental deletions and client-side ransomware
- Security tooling — Security Advisor, 2FA, firewall, auto-block, encrypted folders — is comprehensive and understandable to non-specialists
- 2.5GbE port is a real improvement over the previous generation and roughly matches what two HDDs can deliver
- Third-party drives are supported again under DSM 7.3 and later, removing the biggest objection to the 2025 lineup
- Quiet and power-efficient enough to live in an occupied room
- Three-year warranty with a five-year extension option, and an established support and RMA process
Cons
- The Intel Celeron J4125 is a 2019 processor, unchanged from the previous generation — you're paying 2026 prices for older silicon
- 2GB of RAM out of the box is genuinely tight; treat the 4GB upgrade as part of the purchase price
- No M.2 NVMe slots at all, so SSD caching is off the table permanently
- Only one of the two Ethernet ports is 2.5GbE; SMB multichannel was reported as non-functional in at least one independent test
- Media transcoding behavior is unclear and inconsistently reported — don't buy this specifically as a Plex box without verifying first
- No expansion unit support — two bays is the permanent ceiling
- Competitors offer newer CPUs, four times the RAM, and dual M.2 slots at similar or lower prices
- Synology's 2025 drive-lock episode, even though reversed, is a reasonable reason to be cautious about long-term policy stability
Best Alternatives
| Alternative | Why Consider It |
|---|---|
| Synology DS425+ | Anyone who expects to outgrow two bays, or wants better resilience — 4 bays, same J4125, adds RAID 5/6 and two M.2 slots (~$519) |
| Synology DS725+ | Small businesses that need ECC memory, more RAM headroom, and a growth path — AMD R1600, 4GB ECC RAM (32GB max), 2x M.2, expandable to 7 bays (~$519.99) |
| UGREEN NASync DXP2800 | Buyers who prioritize hardware value and are comfortable with a younger, less mature software platform — Intel N100, 8GB DDR5, 2x M.2 NVMe, 2.5GbE, 4K HDMI (~$320–$390) |
| Synology DS223 (Value series) | Simple file storage and Time Machine only, where business software isn't needed — ARM CPU, no Active Backup for Business, no Docker |
Final Verdict: Good Buy
The DS225+ is a sensible, unexciting product. The hardware is dated and the value proposition on paper is weak, but the software is where the actual work happens, and Synology's software is the most beginner-safe, best-documented option in this category. For a home office or a small business that wants a private file server and a serious local backup target without hiring someone to run it, that matters more than the CPU generation. Two conditions attach to that recommendation: add the 4GB memory module at purchase, because 2GB will constrain you as soon as you run more than one service; and pair it with a genuine offsite backup, because a mirrored pair of drives in your office is protection against drive failure and nothing else. If you need four bays, ECC memory, NVMe caching, or an expansion path, step up to the DS425+ or DS725+ instead.
FAQ
Can I use Seagate or WD drives in the DS225+, or do I have to buy Synology drives?
You can use third-party drives. Synology's 2025 policy originally restricted new Plus models to validated drives, but that was reversed with DSM 7.3 in October 2025. WD Red Plus, Seagate IronWolf, and Toshiba N300 all work normally.
Do I need a subscription to use it?
No. DSM and the core apps — Synology Drive, Active Backup for Business, Hyper Backup, Synology Photos, Container Manager, Surveillance Station — are included with the hardware at no recurring cost. Optional paid extras exist (Synology C2 cloud backup, additional Surveillance Station camera licenses, Plex Pass for transcoding), but none are needed for standard file serving and backup.
How do firmware and software updates work?
DSM updates are delivered over the internet and installed from the web interface. You can set security and minor patches to install automatically, and Synology rolls out major versions in phases over several weeks. A sensible policy is automatic security patches, manual review of major version jumps.
Is a NAS enough on its own, or do I still need cloud backup?
You still need a second copy elsewhere. RAID 1 protects against one drive failing — it does not protect against theft, fire, flood, a power surge that kills both drives, accidental deletion that syncs everywhere, or ransomware that reaches the shares. The standard guidance is three copies of your data, on two different media, with one offsite.
Should I get the DS225+ or spend more on the DS725+?
Get the DS225+ if two bays covers your capacity needs for the next several years and your workload is file sharing, backups, and light app usage. Spend the extra roughly $180 on the DS725+ if you want ECC memory, need more than 6GB of RAM, want NVMe caching, or want the option to expand to seven bays later.
Where to Go From Here
Want the full picture on securing your home office network? SOHO 2026 covers it end to end.
Get SOHO 2026 →This review is part of the TechODash SOHO Reviews series, built for home offices, remote workers, creators, and small businesses that want practical protection without enterprise complexity.