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

Buffalo Technology

Buffalo Technology TS5420DN4804 4-Bay 48TB Desktop NAS

SKU CH-254P-XV5AA MPN TS5420DN4804

Four-bay desktop NAS with 48 TB of pre-installed drives, a 2.04 GHz quad-core processor, 8 GB DDR4 memory, native 10 GbE and dual 1 GbE ports, plus RAID 0/1/5/6/10 support

  • 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 48TB (4 x 12TB)

Model Fully Populated

  • Pre-tested 12TB NAS drives included and RAID pre-configured
  • Native 10GbE port enables high-speed file transfers without cable upgrades
  • Annapurna Labs AL524 2.04 GHz quad-core processor with 8GB DDR4 memory
  • AES-256 encryption, 2-factor authentication and snapshot backup protect data
  • VMware and Windows Server 2022 certified for virtualization deployments

Ready-to-use 48 TB storage

The TeraStation 5420 ships with four 12 TB NAS-grade drives installed and RAID pre-configured so the array is operational immediately. It targets small businesses and departments that need a high-capacity file server without the delay of drive installation and RAID setup.

Integrated cloud and snapshot features

Built-in support for Amazon S3, Dropbox, Microsoft Azure and OneDrive lets the NAS replicate data to public cloud targets without third-party software. Snapshot technology provides near-instantaneous point-in-time recovery, while AES-256 encryption and two-factor authentication secure stored files.

10GbE single-port ceiling

The single native 10GbE port caps peak network throughput at ten gigabits per second; two additional 1GbE ports handle management or secondary traffic. Four USB 3.0 and 2.0 ports allow direct-attached expansion, but the SATA drive bays limit internal growth to the four installed drives.

How it compares

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

Price $1,762.99
Pricier than about 80% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameBUFFALO
Product lineTeraStation 5020
Model nameTS5420DN4804
Part numberTS5420DN4804
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 included48 TB (4 × 12 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 weight8.62 kg
Package size363 × 358 × 310 mm
Compatibility
Compatible drivesOP-HD12.0N
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

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Questions about this item

Will the four pre-installed 12TB SATA drives need to be replaced on a schedule?

The drives are NAS-grade and pre-tested; replacement is only required if a drive fails or capacity needs exceed the 48TB total.

What limits throughput when the 10GbE port runs at full speed all day?

The Annapurna Labs AL524 quad-core processor at 2.04 GHz and 8GB DDR4 memory set the processing ceiling for sustained transfers.

How much heat and noise does the 60W power draw produce in a quiet office?

At 60W maximum consumption the unit generates modest heat; fan noise is low enough for desktop placement in typical office environments.

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