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Buffalo TeraStation 5420 4-bay desktop NAS in matte black finish

Buffalo Technology

Buffalo Technology TS5420DN4002 4-Bay 40TB NAS

SKU CH-VJ4X-XSAYC MPN TS5420DN4002

A four-bay desktop NAS with 40 TB of pre-configured storage, a 10 GbE port, and quad-core processor for business file sharing

  • TypeDesktop NAS
  • StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
  • Ports1 x 10GbE
  • Port RJ-451 x 10GbE + 2 x 1GbE
  • Port USB2 x USB3.0 + 2 x USB2.0
  • HDD Interface4 x SATA (4 x Bay)

Included HDD Capacity 40TB (2 x 20TB)

Struck-through versions exist but are not stocked here.

Option Partially Populated

  • Ready to deploy with pre-tested drives and RAID configured
  • Native 10GbE port delivers high-speed transfers without cable upgrades
  • Quad-core AL524 processor and 8GB DDR4 handle demanding workloads
  • AES-256 encryption with two-factor authentication protects sensitive data
  • VMware and Windows Server 2022 certified for virtualization environments

4-Bay 40TB Business NAS

The Buffalo TeraStation 5420 arrives with two pre-tested 20TB NAS-grade drives installed and RAID pre-configured. A quad-core Annapurna Labs Alpine AL524 processor at 2.04 GHz and 8GB of DDR4 memory handle file serving, backup and virtualization workloads for small offices.

Teams needing native 10GbE and cloud sync

The single 10GbE port plus two 1GbE links suit workgroups that move large datasets without upgrading cabling. Buyers who require more than four drive bays, a second 10GbE port or GPU-accelerated applications should consider a larger platform.

Included drives and remote management console

Two 20TB drives and the pre-built RAID array eliminate initial setup time. The Remote Management System lets administrators monitor multiple TeraStations from one console, while AES-256 encryption, snapshots and two-factor authentication secure stored data.

Highlights

  • Ready to deploy with pre-tested drives and RAID configured
  • Native 10GbE port delivers high-speed transfers without cable upgrades
  • Quad-core AL524 processor and 8GB DDR4 handle demanding workloads
  • AES-256 encryption with two-factor authentication protects sensitive data
  • VMware and Windows Server 2022 certified for virtualization environments

Specifications

BrandBUFFALO
SeriesTeraStation 5020
ModelTS5420DN4002
Part NumberTS5420DN4002
TypeDesktop NAS
StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Ports1 x 10GbE
Port RJ-451 x 10GbE + 2 x 1GbE
Port USB2 x USB3.0 + 2 x USB2.0
HDD Interface4 x SATA (4 x Bay)
Form Factor4-Bay
ProcessorAnnapurna Labs Alpine Processor AL524 (2.04 GHz Quad-Core)
Installed Memory8GB DDR4
Included HDD Capacity40TB (2 x 20TB)
RAIDRAID 0, 1, 5, 6, 10, and JBOD
Drive CompatibilityOP-HD20.0N
Supported ProtocolsTCP/IP
LEDsPower, HDD (Hard Disk Drive), LAN (10/100)
Power100-240 VAC 50/60Hz
Power Consumption60W
Temperature0°C - 40 °C
Humidity0-80% RH non-condensing
UsageHigh read/write performance with RAID
Dimensions9.1 x 6.7 x 8.5 in
Weight18.1 lbs
Package ContentsTeraStation, Quick Setup Guide, AC Cable, Front Panel Key, and Warranty Statement
Shipping weight7.26 kg
Package size363 × 358 × 305 mm

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Questions about this item

What network cabling and switch ports do I need to use the native 10GbE port on this TS5420DN4002?

Connect the 10GbE RJ-45 port with Cat6a or better cabling to a switch port that supports 10GBASE-T. The unit also includes two 1GbE RJ-45 ports for standard Gigabit links.

Can I keep using my existing 1GbE network gear while adding this NAS with its 10GbE port?

Yes. The NAS provides one 10GbE and two 1GbE RJ-45 ports simultaneously, so it will operate on your current Gigabit infrastructure while also offering a 10GbE uplink for faster clients.

How do I verify the pre-configured RAID is healthy after first power-up?

Check the front-panel LEDs: the Power LED should be solid on, each installed drive shows a steady HDD LED, and the LAN LEDs indicate link speed. Then log into the web UI to confirm RAID status and drive health.

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