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Buffalo TeraStation 5420 four-bay desktop NAS in black finish

Buffalo Technology

Buffalo Technology TS5420DN1604 4-Bay 16TB Desktop NAS

SKU CH-XZFZ-SDPFM MPN TS5420DN1604

Four-bay desktop NAS with 16 TB of pre-installed drives, a quad-core 2.04 GHz processor, 8 GB DDR4 memory, and a native 10GbE 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 16TB (4 x 4TB)

Model Fully Populated

  • Pre-tested NAS-grade drives with RAID pre-configured for immediate deployment
  • 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 plus 2-factor authentication and snapshot backup for enhanced security
  • VMware and Windows Server 2022 certified for virtualization solutions

4-Bay 16TB Desktop NAS

The Buffalo TeraStation 5420 delivers 16 terabytes of pre-configured storage across four drive bays. It ships with four 4TB NAS-grade hard drives already installed and RAID-ready for small-business file serving, backup targets or virtualization hosts.

Pre-tested drives and RAID presets

Drives arrive tested and the array is pre-configured, so the unit can join the network without a manual build step. Snapshot technology adds near-instant recovery points, while AES-256 encryption and two-factor authentication harden data at rest and in transit.

10GbE and 1GbE network limits

A single 10GbE RJ-45 port handles high-throughput transfers when the switch and cabling support it, while two 1GbE ports provide fallback connectivity. Transfer rates will drop to the slowest link in the path, so environments without 10GbE infrastructure will not reach the top speed.

How it compares

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

Price $1,053.99
Pricier than about 69% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameBUFFALO
Product lineTeraStation 5020
Model nameTS5420DN1604
Part numberTS5420DN1604
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 included16 TB (4 × 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 weight7.94 kg
Package size373 × 363 × 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

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Questions about this item

When will the four pre-installed 4 TB SATA drives need replacement?

The unit ships with four 4 TB NAS-grade SATA drives in a pre-configured RAID array; drive lifespan depends on workload, but the hardware supports hot-swap replacement without downtime.

Which resource hits its ceiling first during continuous heavy transfers?

The single 10 GbE port and two 1 GbE ports set the network throughput limit before the Annapurna Labs AL524 quad-core processor or 8 GB DDR4 memory become bottlenecks.

How much heat and power does the NAS produce when running 24/7?

Rated power draw is 60 W from a 100-240 VAC supply; the desktop chassis uses internal fans to dissipate that heat under sustained operation.

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