This is a pre-owned item in working condition. Please review all photos carefully, as they are an important part of the description and accurately show the item's condition.
Drive Tray Issue:One of the drive trays does not close properly. Sometimes it locks, but most of the time it does not. Please use the key provided on the back of the device. You may need to adjust the tray slightly and try a few times to get it to lock securely. The four others are fine.
You will receive the following items below:

• 1 x Synology DX517 5-Bay Expansion
• 8 x Western Digital WD 8TB
• 1 x 6GB eSATA Cable
• 1 x Power Cable
• 1 x Key for Drive tray

Note: Shipping to U.S address only.
Item Description:

• 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.
• 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.
• The hot-swappable drive trays of DX517 allow easy drive installation and replacement without powering down the system. Screwless drive tray design reduces the time needed for system setup.
• Synology DX517 can be used as a dedicated local backup solution for the Synology DiskStation. When created as a separate volume, the DX517 provides a great backup solution to its local hard disks in case of system failure.