Network-attached storage for homes and small businesses promising dependable data transfers and flexible expansion. Owners who archive photos, run Plex or need reliable backups will appreciate the peace of mind offered by Synology DiskStation DS925+. Is it the right fit for your network and future storage needs?
⚡ At a Glance
- • Performance: Up to 522/565 MB/s sequential read/write throughput for stable transfers; only compatible with Synology branded drives
- • Best for: Home users and small businesses needing reliable backups, media streaming, and light virtualisation
- • Not ideal for: Environments that require third-party drive flexibility or minimum-cost DIY storage
High sequential throughput keeps large file transfers consistent. Expandable bays and NVMe caching enable responsive storage for growing needs.
Fast Transfers – Thanks to up to 522/565 MB/s sequential throughput
Sequential read and write figures reflect sustained large-block performance across the NAS chassis, optimised for networked file operations. Throughput numbers are achieved with compatible network and Synology drives under standard test conditions.
Sustained transfer speeds reduce wait time when copying large backups or media libraries. Time savings are most noticeable during initial backups and bulk file restores.
Smoother Multi-user Access – With dual 2.5GbE network ports
Two 2.5GbE ports allow higher aggregate bandwidth than standard Gigabit Ethernet and improved redundancy for simultaneous connections. Ports can be used for link aggregation or separate networks to balance traffic.
Multiple users can stream 4K media or run concurrent backups with fewer interruptions. Network-heavy tasks feel more consistent on home lab and small office setups.
Scalable Storage and Faster I/O – Thanks to M.2 NVMe SSD caching and DX525 expansion
M.2 NVMe SSD slots enable cache tiers that accelerate random I/O for frequently accessed data while the DX525 expansion unit adds five drive bays to reach nine total bays. Expansion increases raw capacity and aggregate storage flexibility.
Start small and grow without replacing the main unit, while caching keeps applications and VMs responsive. Ideal for users expecting storage growth or who run media servers and virtual machines.
✨ The 4 Key Reasons for Synology DiskStation DS925+
- M.2 NVMe SSD caching — Speeds up random I/O for snappier app and VM performance
- Expandable to 9 bays with DX525 — Grow storage without changing core server hardware or downtime
- Dual 2.5GbE networking — Enables faster multi-user access and smoother 4K Plex streaming
- 3-year limited hardware warranty (extendable) — Warranty extendable to five years for longer-term peace of mind
📋 Technical Details at a Glance
- Category: 4-bay NAS, expandable to 9 bays
- Drive Bays: 4 internal bays
- Max Expansion: Expandable to 9 bays with DX525 expansion unit
- Max Storage: Up to 180 TB when expanded with DX525
- Sequential Read/Write: Up to 522/565 MB/s sequential throughput
❓ Frequently Asked Questions
Q: Can I expand storage beyond the four internal bays?
A: Yes. Expansion is supported using the DX525 expansion unit, allowing up to nine bays and up to 180 TB of storage when combined.
Q: Does the NAS support SSD caching?
A: Yes. M.2 NVMe SSD caching is supported to accelerate random I/O and improve responsiveness for frequently accessed data.
Q: Are third-party hard drives supported?
A: No. Compatibility is limited to Synology branded drives, according to the product information provided.
🏆 Our Verdict
Suitable for home users and small businesses that need fast local storage, reliable backups and smooth media streaming. Strong sequential throughput, dual 2.5GbE networking and NVMe caching combine with DX525 expandability to create a flexible, scalable storage platform. While it represents an investment, the extendable warranty and Synology ecosystem support long-term value.
