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Buffalo TeraStation 5420 four-bay desktop NAS in black finish

Buffalo Technology

Buffalo Technology TS5420DN2402 4-Bay 24TB Desktop NAS

SKU CH-CD1G-852PE MPN TS5420DN2402

A 4-bay desktop NAS with 24 TB of pre-installed drives, a 2.04 GHz quad-core processor, 8 GB DDR4 memory, native 10GbE plus dual 1GbE ports, RAID 0/1/5/6/10/JBOD, AES-256 encryption.

  • 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 24TB (2 x 12TB)

Model Partially Populated

  • Pre-configured RAID with 24TB of NAS-grade drives saves setup time
  • 10GbE port enables high-speed file transfers without cable upgrades
  • Quad-core 2.04 GHz processor with 8GB DDR4 handles demanding workloads
  • AES-256 encryption, 2-factor authentication and snapshots protect business data
  • VMware and Windows Server 2022 certified for virtualization deployments

Ready-to-use 24 TB desktop NAS

The Buffalo Technology TS5420DN2402 arrives with two 12 TB NAS-grade drives pre-installed and RAID pre-configured so the unit is operational straight out of the box. A quad-core Annapurna Labs Alpine AL524 processor at 2.04 GHz and 8 GB of DDR4 memory handle demanding file workloads and virtualization tasks. The four-bay chassis supports SATA drives and offers RAID 0, 1, 5, 6, 10 and JBOD for flexible data protection.

Small businesses needing secure shared storage

Teams that require native 10 GbE connectivity, AES-256 encryption, two-factor authentication and snapshot backup will find the feature set aligned with compliance and productivity goals. VMware and Windows Server 2022 certification simplifies integration into existing virtual infrastructure. Organisations without 10 GbE cabling or those needing more than four drive bays should evaluate larger or differently equipped platforms.

Cloud sync and remote management included

Built-in compatibility with Amazon S3, Dropbox, Microsoft Azure and OneDrive enables automated off-site replication without third-party software. The Remote Management System lets administrators monitor and configure multiple TeraStation units from a single console, reducing overhead for distributed offices. Two USB 3.0 and two USB 2.0 ports provide direct-attached backup or expansion options.

How it compares

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

Price $1,202.99
Pricier than about 72% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameBUFFALO
Product lineTeraStation 5020
Model nameTS5420DN2402
Part numberTS5420DN2402
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 included24 TB (2 × 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 weight7.26 kg
Package size381 × 356 × 305 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

5 more in the same range

Questions about this item

Do I need to buy four drives for the four-bay chassis or does the TS5420DN2402 ship with disks installed?

The unit includes two 12 TB NAS-grade drives pre-installed and RAID-configured, so it works immediately; the remaining two bays are empty for future expansion.

Can I connect the 10 GbE port to my existing Cat5e patch panel and still reach full speed?

The 10 GbE RJ-45 port requires Cat6a or better cabling for 10 Gbit/s; on Cat5e it will negotiate down to 1 Gbit/s alongside the two dedicated 1 GbE ports.

How do I confirm the Annapurna Labs AL524 quad-core CPU and 8 GB DDR4 are operating normally after first boot?

Log into the web dashboard — the system-info page shows the 2.04 GHz quad-core processor, 8 GB DDR4 memory, drive health, RAID status and network link speeds in real time.

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