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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

  • 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 48TB (4 x 12TB)

Struck-through versions exist but are not stocked here.

Option 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.

Highlights

  • 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

Specifications

BrandBUFFALO
SeriesTeraStation 5020
ModelTS5420DN4804
Part NumberTS5420DN4804
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 Capacity48TB (4 x 12TB)
RAIDRAID 0, 1, 5, 6, 10, and JBOD
Drive CompatibilityOP-HD12.0N
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 weight8.62 kg
Package size363 × 358 × 310 mm

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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