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

Buffalo Technology

Buffalo Technology TS5420DN0802 4-Bay 8TB Desktop NAS

SKU CH-PM3W-FWRAA MPN TS5420DN0802

Four-bay desktop NAS with 8 TB of pre-installed drives, a quad-core 2.04 GHz processor, 8 GB DDR4 memory and a native 10 GbE port

  • CPUAnnapurna Labs Alpine Processor AL524 (2.04 GHz Quad-Core)
  • Form factor4-Bay
  • Port count1 × 10GbE
  • Power draw60 W
  • Supported standardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
  • LAN ports1 × 10GbE + 2 × 1GbE

Included HDD Capacity 8TB (2 x 4TB)

Model Partially Populated

  • Pre-tested NAS-grade drives included and RAID pre-configured for immediate use
  • Native 10GbE port enables high-speed file transfers without cable upgrades
  • VMware- and Windows Server 2022-certified for virtualization deployments
  • AES-256 encryption with 2-factor authentication and snapshot backup protects data
  • Remote Management System controls multiple devices from a single console

4-Bay Desktop NAS with 8 TB Storage

The Buffalo TeraStation 5420 delivers a pre-populated 8 TB desktop NAS using two 4 TB NAS-grade drives. A quad-core Annapurna Labs AL524 processor running at 2.04 GHz and 8 GB of DDR4 memory power the unit for small-business file sharing and backup workloads.

Sustained Load Behaviour

RAID levels 0, 1, 5, 6, 10 and JBOD are pre-configured so data protection begins immediately. The AL524 quad-core architecture maintains throughput during concurrent multi-user access while snapshot technology provides near-instantaneous backup and recovery without interrupting ongoing transfers.

10GbE and USB Interface Limits

A single native 10GbE RJ-45 port alongside two 1 GbE ports handles high-speed file transfers over existing cabling. Two USB 3.0 and two USB 2.0 ports allow direct-attached expansion or printer sharing. Cloud integration with Amazon S3, Dropbox, Azure and OneDrive extends the storage boundary beyond the local network.

How it compares

Measured against everything we stock in Multi-Bay Desktop NAS, at today’s prices. Recalculated every night.

Price $823.99
Pricier than about 62% of the 230 comparable items (median $562.49).

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameBUFFALO
Product lineTeraStation 5020
Model nameTS5420DN0802
Part numberTS5420DN0802
Product typeDesktop NAS
Recommended useHigh read/write performance with RAID
Processor
CPUAnnapurna Labs Alpine Processor AL524 (2.04 GHz Quad-Core)
Memory
Installed RAM8 GB DDR4
Storage
Drive interface4 x SATA (4 x Bay)
Drives included8 TB (2 × 4 TB)
Supported RAID modes0, 1, 5, 6, 10, and JBOD
Connectivity
Supported standardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Protocol supportTCP/IP
Ports & slots
Port count1 × 10GbE
LAN ports1 × 10GbE + 2 × 1GbE
USB ports2 x USB3.0 + 2 x USB2.0
Power
Power draw60 W
Power details100-240 VAC 50/60 Hz
Size & build
Form factor4-Bay
Product dimensions9.1 × 6.7 × 8.5 in
Product weight18.1 lb (8.21 kg)
Shipping weight6.94 kg
Package size373 × 366 × 323 mm
Compatibility
Compatible drivesOP-HD4.0N
In the box
In the boxTeraStation, Quick Setup Guide, AC Cable, Front Panel Key, and Warranty Statement
Environment & compliance
Temperature range0 °C - 40 °C
Humidity range0-80% RH non-condensing
More details
Indicator lightsPower, HDD (Hard Disk Drive), LAN (10/100)

Other versions of this model

5 more in the same range

Questions about this item

How much power does the TS5420DN0802 draw when it runs continuously?

The unit is rated at 60W and operates from a 100-240 VAC 50/60Hz supply.

What network infrastructure is required to use the 10GbE port on this NAS?

A 10GbE-capable switch or router with an RJ-45 port and Cat6a or better cabling.

Will the TS5420DN0802 work with the 1GbE switches and Cat5e cables already in my office?

Yes, the two 1GbE RJ-45 ports auto-negotiate to 1GbE speeds over existing Cat5e infrastructure.

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