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Silver 4-bay rackmount NAS expansion unit with front drive trays

Synology Inc.

Synology RX426 4-bay rackmount NAS expansion unit

SKU CH-B969-BM4GF

Adds four 3.5" or 2.5" SATA drive bays to a compatible RackStation via plug-and-play USB-C expansion cable

  • Drive Compatibility3.5" SATA HDD 2.5" SATA SSD
  • Power100-240 VAC 50/60Hz
  • Power Consumption29.96 W (Access) 6.63 W (HDD Hibernation)
  • TemperatureOperating Temperature: 0°C to 35°C (32°F to 95°F) Storage Te
  • HumidityOperating Humidity: 8% to 80% RH Storage Humidity: 5% to 95%
  • Dimensions44 x 430.5 x 290 mm
  • Add four bays to a RackStation without downtime
  • Plug-and-play setup managed in DiskStation Manager
  • Supports 3.5" SATA HDD and 2.5" SATA SSD
  • 96 W active power and 6.63 W hibernation
  • Rackmount 44 x 430.5 x 290 mm at 4.18 kg

Expansion Unit RX426

The Synology RX426 is a 4-bay rackmount expansion unit that adds four additional drive bays to compatible RackStation systems. It accepts 3.5-inch SATA hard drives and 2.5-inch SATA solid-state drives. Connection is made through a supplied USB Type-C expansion cable for plug-and-play deployment without service interruption.

Suitable for Synology RackStation owners needing

This unit suits administrators who want to grow storage capacity on an existing compatible Synology RackStation using SATA drives. It is not for users who lack a compatible host system, who require direct-attached storage via other interfaces, or who need more than four additional bays from a single enclosure.

Four-bay SATA expansion via USB Type-C

The decisive specification is the four drive bays supporting 3.5-inch and 2.5-inch SATA drives connected through a single USB Type-C expansion cable. This determines whether the enclosure matches the host system's expansion capability and the drive form factors in use.

Highlights

  • Add four bays to a RackStation without downtime
  • Plug-and-play setup managed in DiskStation Manager
  • Supports 3.5" SATA HDD and 2.5" SATA SSD
  • 96 W active power and 6.63 W hibernation
  • Rackmount 44 x 430.5 x 290 mm at 4.18 kg

Specifications

BrandSynology
ModelRX426
Drive Compatibility3.5" SATA HDD
2.5" SATA SSD
Power100-240 VAC 50/60Hz
Power Consumption29.96 W (Access)
6.63 W (HDD Hibernation)
TemperatureOperating Temperature: 0°C to 35°C (32°F to 95°F)
Storage Temperature: -20°C to 60°C (-5°F to 140°F)
HumidityOperating Humidity: 8% to 80% RH
Storage Humidity: 5% to 95% RH
Dimensions44 x 430.5 x 290 mm
Weight4.18 kg
Package ContentsMain Unit x 1
Expansion Cable: USB Type-C x 1
Accessory Pack x 1
AC Power Cord x 1

Questions about this item

Can the RX426 connect to my existing RackStation without shutting it down?

Yes, the RX426 adds four 3.5" or 2.5" SATA bays to a compatible RackStation with no system or service downtime required.

How do I verify the RX426 is operating correctly after connecting it?

Use Storage Manager in Synology DiskStation Manager to confirm the new bays appear, then check drive status and temperature readings between 0°C and 35°C.

What cables and accessories ship with the RX426, and do I need anything else?

The box includes the main unit, one USB Type-C expansion cable, an accessory pack and an AC power cord; drives are sold separately.

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