Synology DX525 5-Bay Desktop Expansion Unit (Diskless) for DiskStation
Synology DX525 5-Bay Desktop Expansion Unit (Diskless) for DiskStation
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🚀 Seamless Storage Expansion: Effortlessly add 5 additional drive bays to your compatible Synology DiskStation without any system downtime.
🔌 Plug-and-Play Design: Features an easy-to-use setup with a dedicated expansion cable (USB-C), ensuring instant volume availability through DSM.
🔄 Hot-Swappable Bays: Supports both 3.5" SATA HDDs and 2.5" SATA SSDs with hot-swap capability for uninterrupted data access and maintenance.
🛡️ Reliable Backup Solution: Functions as a dedicated local backup destination when configured as a separate volume, enhancing your data redundancy.
⚡ High-Performance Ready: Optimized for Synology 25-series models to deliver consistent throughput and deep hardware-software integration.
🏢 Enterprise-Grade Reliability: Backed by a 3-year hardware warranty and synchronized power management with the host NAS for energy efficiency.
Expand your storage potential effortlessly with the diskless Synology DX525. Designed specifically for Synology’s 25-series desktop models, this 5-bay expansion unit allows you to scale up your data capacity on the fly without interrupting existing services. Whether you need extra space for growing media libraries or a dedicated local backup volume, the DX525 delivers enterprise-level reliability. With its plug-and-play USB-C connectivity and synchronized power recovery, managing your expanding digital infrastructure has never been simpler or more secure.
| Product Type | NAS Expansion Unit |
| Drive Bays | 5 Bays |
| Supported Drive Size | 3.5″ SATA HDD, 2.5″ SATA HDD / SSD |
| Drive Hot Swap | Yes |
| RAID Management | Managed via Synology DSM |
| Expansion Interface | 1 × USB‑C Expansion Port |
| Compatible Models | 25 Series: DS1825+, DS1525+, DS925+, DS725+ |
| Dimensions (H × W × D) | 166 × 230 × 223 mm |
| Power Supply | 90 W Adapter |
| Power Consumption | 35.37 W (Access), 7.0 W (HDD Hibernation) |
| Operating Temperature | 0°C to 40°C |
| Noise Level | 20.4 dB(A) |
| Certifications | FCC, CE, BSMI, UKCA, EAC, VCCI, RCM, KC, BIS |
| Country of Origin | Taiwan |
| Net Weight | 2.46 kg |
| Warranty | 3 Years Limited Hardware Warranty |
| Part Number | DX525 |
Pick drives, plan your RAID, add cache, memory and setup. The more you add, the more you save.
Ordered on quote
Tell us your capacity and use case. We plan the drives, RAID and setup, and arrange payment and delivery.
Plan your storage
Set your bays and RAID, then pick a drive. Each drive shows the usable capacity it gives.
Choose a drive
Add SSD cache or an NVMe pool
Add a memory upgrade
Add installation and setup
Our engineers set up RAID, volumes, users and backups, on site or remote. Choose one.
Review your solution
Here is everything you have configured.
Compatibility is taken from each manufacturer datasheet and official list. “Compatible” parts meet the model spec but are not on the brand verified list.