Synology DS925+ Review — Australian Pricing and Verdict

The Synology DS925+ is the best 4-bay NAS for Australian small businesses and power users who need reliable, expandable storage with genuine performance headroom. Priced from $995 at Scorptec to $1,029 at Mwave (February 2026), it slots between the consumer-focused DS425+ ($819-$899) and the 5-bay DS1525+ ($1,285-$1,399). If you run Plex, Active Backup for Business, Docker containers, or Synology Drive for a team of 10-20 users, the DS925+ has the CPU and ECC memory to handle it. If you only need basic file sharing and backup for a household, the DS425+ at~$980 will do the job and save you $176. Don't overspend on hardware you won't use.

DS925+ Full Specifications

Australian Pricing and Where to Buy

Scorptec currently has the DS925+ at $995 (in stock), while Mwave lists it at $1,029. PLE Computers does not stock the DS925+ at the time of writing. That $34 spread is typical. NAS margins in Australia run at 3-5%, leaving little room for price variation. The meaningful difference between retailers is stock availability, pre-sales knowledge, and after-sales support, not the price tag.

Business and government buyers should always request a formal quote rather than paying the listed retail price. Resellers can request pricing support from their distributors (BlueChip and MMT both distribute Synology in Australia), and vendors sometimes provide additional discounts to close deals. Quoted pricing is often at or near sale pricing.

Performance: AMD Ryzen V1600B

The AMD Ryzen V1600B is a meaningful step up from the Intel Celeron J4125 used in the DS923+ and DS425+. Four Zen 1 cores with simultaneous multithreading (8 threads) handle concurrent workloads far more comfortably. Running Active Backup for Business on a schedule while serving files to a dozen users and transcoding a Plex stream is well within the V1600B's capability. The Celeron J4125 can do this too, but it shows strain under combined loads, particularly when Docker containers are in the mix.

For Plex users, the V1600B's hardware transcoding handles a single 4K or multiple 1080p streams. Direct play is always preferable, but for remote streaming over NBN where upload speeds top out at 20-40 Mbps on most plans, the DS925+ can transcode down to a manageable bitrate. On a typical NBN 100 plan with around 20 Mbps upload, a single 1080p transcode is comfortable. Note that CGNAT on some Australian ISPs (particularly Aussie Broadband and TPG fixed wireless) blocks direct remote access. You'll need a static IP, VPN tunnel, or Plex Relay as a workaround.

ECC RAM: Why It Matters

ECC (Error-Correcting Code) memory detects and corrects single-bit errors in real time. On a NAS running 24/7 with RAID parity calculations, Btrfs checksumming, and database operations, an undetected memory error can silently corrupt data before it's written to disk. Standard non-ECC RAM lets these errors pass unnoticed. ECC eliminates this risk. Particularly important for a device that manages your data around the clock.

The DS925+ ships with 4 GB DDR4 ECC, expandable to 32 GB across two slots. Synology's 8 GB ECC SODIMM is~$980 at Mwave. Expensive, but third-party DDR4 ECC SODIMMs can be sourced for less. For business deployments, use Synology-branded modules to maintain full support coverage. If you plan to run Docker, VMs, or Surveillance Station, upgrade to at least 8-16 GB. The default 4 GB becomes a bottleneck quickly once you layer on services.

Networking and 10GbE Expansion

Two 2.5 GbE RJ45 ports support Link Aggregation (802.3ad LACP or ALB) for improved multi-client throughput or failover redundancy. A single file transfer still caps at 2.5 Gbps, but for environments with multiple simultaneous users, the combined bandwidth prevents congestion.

The PCIe Gen 3 x2 expansion slot accepts Synology's E10G18-T1 10GbE adapter ($239 at Mwave, $289 at Scorptec). The x2 lane is a minor limitation compared to x4, but with 4 spinning drives you're unlikely to saturate it. The 10GbE option suits video editing workflows or any environment with regular large file transfers. Just budget for a 10GbE switch or direct connection on the other end.

M.2 NVMe Cache and Storage

Two M.2 2280 NVMe slots on the underside of the DS925+ can be configured as SSD read/write cache to accelerate random I/O. Beneficial for database workloads, VMs, and Synology Drive with many concurrent users. Alternatively, they can form a dedicated SSD storage pool separate from the main SATA array, useful for running Docker containers on fast NVMe while keeping bulk data on larger SATA drives.

DX525 Expansion

The DS925+ supports the DX525 expansion unit ($879 at Mwave), adding five 3.5"/2.5" bays via eSATA for a total of 9 bays. For a small business that starts with 4 drives and grows over 2-3 years, this avoids the cost and downtime of a full NAS migration. At $879, the DX525 is nearly as much as the NAS itself. Users who know they'll need more than 4 bays from day one should consider the 5-bay DS1525+ ($1,285 at Mwave, $1,399 at Scorptec) as a more cost-effective starting point.

Drive Compatibility and DSM 7.3

In April 2025, Synology locked all new Plus series models (including the DS925+) to Synology-branded or specifically certified drives. The community backlash was severe. Synology reversed course with DSM 7.3 in October 2025, restoring support for third-party 3.5" HDDs and 2.5" SATA SSDs from Western Digital, Seagate, and Toshiba. You can use Seagate IronWolf, WD Red Plus, or any mainstream NAS-class drive without restriction on the DS925+.

Two caveats remain: M.2 NVMe SSDs still require HCL-listed drives for new storage pools, and enterprise/rackmount models maintain stricter compatibility. The reputational damage is real. Synology lost trust with enthusiasts, and some of that won't come back quickly. But for the typical SMB or home buyer, the products remain strong and the reversal shows Synology will listen when they overstep. See our Synology NAS Australia guide for full brand context.

Software: DSM and Key Applications

DSM (DiskStation Manager) is the primary reason Synology dominates the Australian consumer NAS market. The web-based interface is clean, intuitive, and rarely overwhelming. For buyers who want a NAS that "just works," DSM delivers.

Active Backup for Business is the standout for SMB deployments. Agentless backup for Windows PCs, servers, VMware, Hyper-V, and Microsoft 365, all managed from a single console. It replaces paid backup subscriptions (Veeam, Acronis) with a licence-free solution included with every Synology NAS. The DS925+'s Ryzen V1600B handles scheduled backups for 20+ endpoints without impacting other services. Synology Drive turns the NAS into a private cloud with desktop and mobile sync. Ideal for businesses handling sensitive data (legal, medical, accounting). Docker runs well for self-hosted applications, while Virtual Machine Manager handles light VM workloads (upgrade RAM to at least 16 GB if VMs are part of your plan).

Who Should Buy the DS925+

The DS925+ is the right NAS if you are:

• A small business (5-50 employees) needing centralised backup, file sharing, and room to grow with the DX525
• A home power user running Plex alongside Docker containers, who needs the CPU headroom and ECC reliability Celeron-based models lack
• A prosumer or creative working with large files who benefits from dual 2.5GbE and the option to add 10GbE
• Upgrading from a DS918+ or DS920+. The DS925+ is the direct successor with better CPU, native 2.5GbE, and built-in M.2 NVMe

Who Should NOT Buy the DS925+

Don't buy the DS925+ if:

• You only need basic backup and file sharing. The DS425+ at~$980 (Scorptec) has 4 bays, runs DSM, and handles home workloads. The $176+ premium for the DS925+ is wasted if you're not pushing the NAS with concurrent services.
• You want deep technical flexibility. The QNAP TS-464 at $999 offers more depth for technical users who want VMs, HDMI output, or a less locked-down OS.
• You need more than 4 bays now. The DS1525+ ($1,285-$1,399) gives you 5 bays natively without needing the $879 DX525.

DS925+ vs DS425+ vs QNAP TS-464

Prices last verified: 10 March 2026. Always check retailer before purchasing.

The DS425+ is the budget-conscious choice at $819. It runs the same DSM software and handles home workloads, but lacks PCIe expansion, M.2 NVMe, and the CPU headroom for stacked services. The QNAP TS-464 at $999 matches the DS925+ on networking, ships with 8 GB RAM (vs 4 GB), adds HDMI 2.0, and offers more hardware per dollar. The Celeron N5095 trades blows with the Ryzen V1600B but lacks ECC. The TS-464 wins on features per dollar; the DS925+ wins on software polish, ease of use, and the DX525 expansion path. As covered in our best NAS Australia guide, the choice usually comes down to user capability and intent.

Warranty, ACL, and After-Sales in Australia

The DS925+ ships with a 3-year warranty, extendable to 5 years. In Australia, your warranty claim goes to the retailer. Synology has no service centre or office here. The process runs: retailer to distributor (BlueChip or MMT) to Synology in Taiwan, then back. Expect 2-3 weeks minimum. Advanced replacements are generally not available through the standard process, though some resellers will let you purchase a replacement and refund you when the faulty unit returns. Ask about this before you buy.

A NAS is not a backup. Plan for a 2-3 week replacement window as the realistic Australian timeline, and build your data protection strategy around the assumption that hardware will eventually fail. A 3-2-1 backup strategy (3 copies, 2 media types, 1 offsite) is the standard. Synology's Hyper Backup makes this straightforward with cloud destinations including Backblaze B2, AWS S3, and Synology C2.

Verdict

The Synology DS925+ is the 4-bay NAS to buy in Australia for small businesses and serious home power users. The AMD Ryzen V1600B with ECC RAM, dual 2.5GbE, M.2 NVMe caching, PCIe expansion, and DX525 expandability make it the most capable compact desktop NAS in Synology's current lineup. At $995-$1,029, it is not an impulse purchase. But for anyone running Active Backup, Synology Drive, Docker, or Plex alongside other services, the DS925+ delivers the performance and reliability to justify the price.

If your needs are simpler, the DS425+ at $819 runs the same software and saves money. If you want more hardware flexibility and are comfortable with a steeper learning curve, the QNAP TS-464 at $999 is a strong alternative. But if you want the most polished NAS experience with genuine SMB capability in a 4-bay form factor, the DS925+ is the one to get. Browse the full Synology lineup ranked for other options.

Related reading: our AU retailer guide.

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See also: our complete Synology ecosystem guide.