Storage expansion and accessories Expansion Unit RX426 Expansion Unit RX426
Expansion Unit RX426 Reliable 4-bay storage expansion for RackStation
Features Specs
Seamless 4-bay capacity expansion Add 4 additional storage bays to compatible RackStation systems with a single RX426 without system or service downtime. Download Datasheet
Simple deployment and managementGet up and running without delay thanks to RX426's plug-and-play design, and easily expand and manage your storage using the intuitive Storage Manager in Synology DiskStation Manager.

Performance backed by Synology drives

Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments.

Hard drives designed for SynologySee how Synology hard drives deliver reliability, consistent performance, and simplified system management through deep hardware-software integration.Watch video
Extended protection with Extended WarrantyThe RX426 is backed by Synology’s 3-year hardware warranty. An optional 2-year extended warranty is available in select regions to extend coverage to 5 years. Learn more
Get in touchWhere to buyLearn moreAsk SynologyLearn moreNotes:Storage drives are sold separately. Refer to the compatibility list for compatible devices before purchasing drives. For more details, please refer to this article.The warranty period starts from the date of purchase as stated on your purchase receipt. Visit https://www.synology.com/company/legal/warranty for more information.
Hardware Specifications
Applied Models
Applied Models
 Supports creating volumes across different units
  • 26 series:RS826RP+, RS826+
Notes 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.
Storage
Storage
 Drive Bays 4
Drive Type (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
RAID Management through Synology DSM
Notes Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article.
External Ports
External Ports
 Expansion Port 1
Appearance
Appearance
 Size (Height x Width x Depth) 44 mm x 430.5 mm x 290 mm
Size (Height x Width x Depth) (with server ears) 44 mm x 480 mm x 325 mm
Weight 4.18 kg
Rack Installation Support
  • 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
  • 2-post 19" rack (direct mounting)
Notes The rail kit is sold separately
Power
Power
 Power Recovery Synchronized with the Synology RackStation
Power Supply Unit / Adapter 100 W
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 29.96 W (Access)
6.63 W (HDD Hibernation)
British Thermal Unit 102.16 BTU/hr (Access)
22.61 BTU/hr (HDD Hibernation)
Notes For more information on how power consumption is measured, refer to this article.
Temperature
Temperature
 Operating Temperature 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH
Storage Humidity 5% to 95% RH
Others
Others
 System Fan 40 mm x 40 mm x 3 pcs
Noise Level 32.8 dB(A)
Notes Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two G.R.A.S. type 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.
Certification
Certification
  • UL
  • FCC
  • CE
  • BSMI
  • UKCA
  • EAC
  • VCCI
  • RCM
  • KC
  • BIS
Warranty
Warranty
 3-year hardware warranty, extendable to 5 years with EW201
Notes
  • Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment & Packaging
Environment
Environment
 RoHS Compliant
Packaging Content
Packaging Content
  • Main Unit X 1
  • Expansion Cable: USB Type-C X1
  • Accessory Pack X 1
  • AC Power Cord X 1
Optional Accessories
Optional Accessories
Notes: Model specifications are subject to change without prior notice. The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.