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Buffalo TeraStation desktop NAS tower in black with four drive bays visible

Buffalo Technology

Buffalo Technology WS5420DN16W5 NAS 16 TB 8 GB Intel Atom C3338 1.5 GHz

SKU CH-07HP-EDW16 MPN WS5420DN16W5

Four-bay desktop NAS with 16 TB of pre-installed storage, an Intel Atom C3338 dual-core processor and 8 GB memory for workgroup file sharing

  • TypeNetwork Attached Storage
  • Form FactorDesktop
  • ProcessorIntel Atom C3338 1.5 GHz Dual-Core
  • Installed Memory8 GB
  • Included HDD Capacity4 TB x4 (16 TB Total)
  • Buffer Size4 MB
  • 16 TB raw storage for workgroup file sharing
  • Intel Atom C3338 dual-core at 1.5 GHz handles concurrent access
  • 8 GB installed memory supports multi-user workloads
  • Four 4 TB drives included and ready to deploy
  • Windows Server IoT 2025 pre-installed for familiar management

Desktop NAS with 16 TB storage

The Buffalo TeraStation WS5420DN16W5 is a desktop network-attached storage system that ships with four 4 TB hard drives for a total of 16 TB. It runs on an Intel Atom C3338 dual-core processor at 1.5 GHz with 8 GB of installed memory and includes Windows Server IoT 2025 for file and application services.

Suited for small workgroups needing Windows-based

This unit fits teams that want a ready-to-use Windows Server IoT appliance for shared files, backups and light applications. It is not intended for environments that require high-performance databases, virtualisation clusters or larger drive counts than the four bays provide.

Four-bay 16 TB capacity with Windows Server IoT 2025

The defining specification is the 16 TB raw capacity across four pre-installed 4 TB drives combined with the Windows Server IoT 2025 operating system. Buyers should confirm that four bays and this OS meet their storage and application requirements before purchasing.

Highlights

  • 16 TB raw storage for workgroup file sharing
  • Intel Atom C3338 dual-core at 1.5 GHz handles concurrent access
  • 8 GB installed memory supports multi-user workloads
  • Four 4 TB drives included and ready to deploy
  • Windows Server IoT 2025 pre-installed for familiar management

Specifications

BrandBUFFALO
TypeNetwork Attached Storage
Form FactorDesktop
ProcessorIntel Atom C3338 1.5 GHz Dual-Core
Installed Memory8 GB
Included HDD Capacity4 TB x4 (16 TB Total)
Buffer Size4 MB
UsageWorkgroup
Shipping weight7.19 kg
Package size376 × 373 × 338 mm

Questions about this item

How do I install the 4 x 4 TB drives into the WS5420DN16W5, and which step is most often missed?

The four 4 TB drives ship pre-installed in the four bays; the step most often missed is inserting the setup media SD card and running the initial Windows Server IoT 2025 configuration wizard before connecting the 6a Ethernet cable.

What maintenance or replacement will the WS5420DN16W5 need later?

The four 4 TB hard drives are the only field-replaceable components; plan to swap any drive that reports SMART errors or reaches its rated workload limit, and keep the 8 GB of installed memory and the Intel Atom C3338 processor as-is.

What limit appears first on the WS5420DN16W5 during sustained heavy workloads?

The dual-core Intel Atom C3338 at 1.5 GHz and 8 GB of memory will saturate before the 16 TB raw capacity or the 4 MB buffer becomes a bottleneck during prolonged multi-user file serving.

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