Supports creating volumes across different units
FS series:FS6400, FS3600, FS3400
Expansion Unit FX2421 can only be used with identical expansion units.
DSM version requirement: 6.2.3-25426-2 or later version.
To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit.
Compatible Drive Type
2.5" SAS HDD
2.5" SAS SSD
2.5" SATA SSD
Maximum Internal Raw Capacity
92.16 TB (3.84 TB drive x 24) (Capacity may vary by RAID types)
Hot Swappable Drive
RAID Management through Synology DSM
"Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
Rack Installation Support
4-post 19" rack (Synology Rail Kit - RKS1317)
The rail kit is sold separately
Power Supply Unit / Adapter
AC Input Power Voltage
100 V to 240 V AC
50/60 Hz, Single Phase
190.99 W (Access)
British Thermal Unit
651.68 BTU/hr (Access)
Redundant Power Supply (for RP model)
Power consumption is measured when it is fully loaded with HGST 1.8TB HUC101818CS4204 hard drive(s).
0oC to 35oC (32oF to 95oF)
-20oC to 60oC (-5oF to 140oF)
5% to 95% RH
80 mm x 80 mm x 4 pcs
Easy Replacement System Fan
Noise Level Testing Environment: Fully loaded with Toshiba 600GB AL14SEB060N hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A), Temperature: 24.25-25.75oC, Humidity: 58.2-61.8%
Environment and Packaging
Main Unit X 1
Accessory Pack X 1
AC Power Cord X 2
Expansion Cable: MiniSAS-HD X 1
Quick Installation Guide X 1
2.5" SATA SSD: SAT5200
Rail Kit Sliding: RKS1317
Free standard domestic shipping.
Free 2-Day domestic shipping on orders over $200.
Free return shipping within the US. Find out more.