Synology DX525 5-Bay Tower Expansion Unit
Effortless Storage Expansion for Growing Demands Expand your Synology DiskStation’s storage capacity on the fly with the DX525 — a 5-bay expansion unit featuring hot-swap...
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Effortless Storage Expansion for Growing Demands
Expand your Synology DiskStation’s storage capacity on the fly with the DX525 — a 5-bay expansion unit featuring hot-swap drive support, seamless DSM integration, and reliable backup solutions.
Highlights
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Adds 5 drive bays to compatible Synology DiskStations1
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Supports both 2.5" and 3.5" SATA HDDs and SSDs
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Hot-swappable drive bays enable non-disruptive upgrades
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Plug-and-play installation for immediate online expansion
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Functions as a dedicated local backup volume for system protection
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Managed directly through Synology DiskStation Manager (DSM)
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Includes a 3-year limited warranty with optional extension
Ideal Use Cases
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Business Storage Expansion: Effortlessly scale as your data grows
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Local Backup Solution: Create a dedicated volume for critical system backup
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Surveillance Deployments: Expand archival storage for IP camera footage
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Creative Studios: Add storage for media asset libraries without downtime
Key Features
Storage & Expansion
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Bays: 5 x 3.5"/2.5" SATA HDD or SSD bays
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Compatibility: Supports Enterprise and Plus Series Synology drives1
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Drive Hot-Swap: Supported for seamless maintenance and upgrades
Setup & Management
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Installation: Plug-and-play via direct connection to host NAS
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Online Volume Expansion: New storage immediately available via DSM
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Management: Unified under Synology DiskStation Manager's Storage Manager
Backup & Data Protection
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Dedicated Volume: Option to configure as a separate backup target
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Local Safeguard: Protects data in case of host system failure
Reliability & Protection
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Build: Synology-grade hardware and integration
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Warranty: 3-year hardware warranty, extendable to 5 years with Extended Warranty3
Summary
The Synology DX525 makes storage expansion fast, easy, and non-disruptive, enabling businesses and power users to seamlessly add up to five additional drives to their DiskStation. With hot-swap support, intuitive DSM integration, and the flexibility to serve as a backup destination, it is a must-have for scaling operations, increasing system resilience, and future-proofing your data infrastructure.
Synology DX525 – 5-Bay Tower Expansion Unit
The Synology DX525 expansion unit offers a flexible and seamless solution to scale your Synology NAS storage. With five additional drive bays and plug-and-play integration through a USB Type-C expansion port, it’s ideal for growing businesses that require reliable, high-capacity storage expansion.
Specifications
| Specification | Details |
|---|---|
| Applied Models | DS925+ |
| Volume Creation Support | Supports creating volumes across different units (recommended to keep volumes within the same unit for optimal performance) |
| Storage | |
| Drive Bays | 5 |
| Supported Drive Types | • 3.5" SATA HDD • 2.5" SATA SSD |
| Hot Swappable Drives | Yes (except M.2 drives) |
| RAID Management | Managed via Synology DSM |
| External Ports | |
| Expansion Port | 1 × USB Type-C |
| Physical | |
| Dimensions (H × W × D) | 166 × 230 × 223 mm |
| Weight | 2.46 kg |
| System Cooling | 2 × 92 mm fans |
| Power | |
| Power Recovery | Synchronized with connected DiskStation |
| Power Supply Unit | 90W adapter (100–240V AC, 50/60Hz, single phase) |
| Power Consumption | 35.37W (Access) 7.0W (HDD Hibernation) |
| Heat Dissipation | 120.69 BTU/hr (Access) 24.02 BTU/hr (HDD Hibernation) |
| Environmental | |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Noise Level | 20.4 dB(A) |
| Certifications | FCC, CE, BSMI, UKCA, EAC, VCCI, RCM, KC, BIS |
| Warranty | 3-year hardware warranty (extendable to 5 years with EW201) |
| Packaging Contents | Main Unit, Expansion Cable (USB Type-C), Accessory Pack, AC Adapter, AC Power Cord |
| Optional Accessories | • Enterprise Series 3.5" SATA HDD: HAT5300 Series • Plus Series 3.5" SATA HDD: HAT3300 Series • Enterprise Series 2.5" SATA SSD: SAT5200 Series |