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Buffalo TeraStation 5420 4-bay desktop NAS in black finish

Buffalo Technology

Buffalo Technology TS5420DN8004 4-Bay 80TB NAS

SKU CH-92VZ-FD3RQ MPN TS5420DN8004

Four-bay desktop NAS with 80 TB of pre-installed drives, a native 10 GbE port, quad-core processor and 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 80TB (4 x 20TB)

Model Fully Populated

  • Ready-to-use storage with 80 TB pre-installed and RAID configured
  • Native 10 GbE port enables fast file transfers without cable changes
  • Quad-core 2.04 GHz processor with 8 GB DDR4 handles demanding workloads
  • VMware and Windows Server 2022 certified for virtualisation deployments
  • AES-256 encryption and two-factor authentication protect business data

Ready-to-deploy 4-bay NAS with 80 TB pre-installed

The TeraStation 5420 arrives with four NAS-grade drives totalling 80 TB and RAID pre-configured so IT teams can mount shares immediately. A quad-core Annapurna Labs AL524 processor at 2.04 GHz and 8 GB of DDR4 memory handle concurrent file protocols and backup jobs without extra provisioning.

Single 10 GbE port plus dual 1 GbE links

One native 10GbE RJ-45 port delivers high-throughput transfers over existing Cat6a cabling while two 1GbE ports provide management or failover paths. Four SATA bays are fully populated, leaving expansion to the two USB 3.0 and two USB 2.0 ports for external targets or UPS signalling.

VMware and Windows Server 2022 certified

Certification means the appliance can serve as a datastore or backup repository in clustered environments without additional qualification. Closed-system firmware, AES-256 volume encryption, two-factor authentication and snapshot recovery are managed through a central console that controls multiple units from one interface.

How it compares

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

Price $2,422.99
Pricier than about 83% 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 nameTS5420DN8004
Part numberTS5420DN8004
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 included80 TB (5 × 16 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 weight7.71 kg
Package size363 × 358 × 310 mm
Compatibility
Compatible drivesOP-HD20.0N
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

Will the 10GbE port become the bottleneck when all four bays are writing at full speed?

The single 10GbE port plus two 1GbE ports handle network traffic, while the quad-core AL524 processor and 8GB DDR4 manage RAID 0, 1, 5, 6, 10 or JBOD across the 80TB of included drives.

How loud and hot does the unit get when it runs 24/7 at the rated 60W power draw?

The desktop chassis measures 9.1 x 6.7 x 8.5 in and weighs 18.1 lbs, operating between 0°C and 40°C with 0-80% non-condensing humidity at 60W consumption.

Which expansion drives are validated for the four SATA bays beyond the factory-installed set?

Buffalo lists OP-HD20.0N as the compatible drive model for the four SATA bays in this 4-bay TeraStation 5020 series unit.

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