Synology DX525 5-Bay Expansion Unit

The Synology DX525 is a 5-bay desktop expansion unit engineered to extend the raw storage capacity of compatible Synology Plus-series NAS systems released in 2025. Connected via a dedicated expansion interface, the DX525 integrates seamlessly into the host NAS's storage pool, allowing administrators to scale usable capacity without deploying an additional standalone NAS or restructuring existing volume configurations. The enclosure supports 3.5-inch SATA HDDs as well as 2.5-inch SATA SSDs, providing flexibility to mix high-capacity spinning media with solid-state tiers depending on workload requirements.

Designed for environments where data growth outpaces the internal drive bays of the primary NAS, the DX525 enables capacity expansion while maintaining a unified management interface through Synology DiskStation Manager (DSM). Storage volumes, RAID groups, and storage pools configured on the host NAS extend transparently to include drives installed in the DX525, preserving existing data protection schemes and simplifying administration. The desktop form factor makes the unit well suited for small to medium-sized business environments, remote offices, and departmental deployments where rack space is unavailable or cost-prohibitive.

The DX525 is built around Synology's established expansion ecosystem, ensuring that enterprise features available on the host NAS—including snapshot replication, tiered storage, and Synology High Availability compatibility—apply equally to volumes spanning the expansion unit. This positions the DX525 as a practical long-term investment for organizations seeking incremental, non-disruptive capacity scaling aligned with the lifecycle of their 2025 Plus-series NAS platforms.

Ideal for

• Primary NAS capacity extension for growing file-share and collaborative storage environments in small-to-medium enterprises
• Surveillance storage expansion for IP camera deployments requiring additional high-capacity HDDs beyond internal NAS bay limits
• Backup and archival tier scaling, accommodating increasing retention volumes for endpoint and server backup jobs managed through Synology Active Backup Suite
• Virtual machine datastore growth for Synology Virtual Machine Manager workloads that have exhausted internal NAS storage pools
• Remote and branch office storage scaling where a compact desktop expansion unit supplements an existing Plus-series NAS without requiring rack infrastructure
• Mixed-media tiered storage buildout, pairing high-capacity SATA HDDs in the DX525 with SSD caching on the host NAS to optimize performance-per-gigabyte ratios

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.