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Synology 5bay Expansion Unit DX517 (Diskless) 157 mm x 248 mm x 233 mm
5-bay SATA expansion Easily add 5 additional drive bays to Synology DiskStation. Supporting both 2.5 and 3.5 SATA drives, DX517 is a flexible solution supporting on-the-fly volume expansion or serving as a local backup destination. Online volume expansion Managed from DiskStation Manager on the host NAS, the additional bays in the DX517 are immediately ready to be used once connected. On-the-fly volume expansion ensures that storage and services on the host are not interrupted during volume expansion. Hot-swappable drive tray design The hot-swappable drive trays of DX517 allow easy drive installation and replacement without powering down the system. Screwless drive tray design

Price is $470.00
Price: $469.99