Expand Your Synology NAS with Ease
The Synology DX517 is a 5-bay diskless expansion unit designed to seamlessly increase the capacity of your existing Synology NAS. With support for up to five 3.5"/2.5" SATA HDDs or SSDs, the DX517 connects via eSATA for high-speed, plug-and-play scalability.

Perfect for growing businesses, creative teams, or archival needs, the DX517 is ideal for expanding storage without replacing your current NAS. It’s also fully integrated into Synology DiskStation Manager (DSM), allowing volume expansion, backup, and hot-swappable drive support with zero downtime.

Key Features:

• 5-Bay expansion chassis – supports 3.5"/2.5" SATA drives (HDD/SSD)

• Connects via eSATA for fast, stable data throughput

• Includes 2 x 80mm system fans for efficient cooling

• Diskless – add your own drives to scale as needed

• Backed by a 3-Year Synology hardware warranty