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Black rectangular desktop NAS with eight drive bays, front status LEDs and rear port array

Buffalo Technology

Buffalo Technology TS5820DN6404 8-Bay NAS 64TB (4×16TB) 8GB DDR4 AL524 2.04 GHz Quad-Core

SKU CH-0PMT-3X9QF MPN TS5820DN6404

Eight-bay desktop NAS with 64 TB of pre-configured RAID storage, a 2.04 GHz quad-core processor, 8 GB DDR4 memory, native 10GbE and dual 1GbE ports

  • CPUAnnapurna Labs Alpine Processor AL524 (2.04 GHz Quad-Core)
  • Form factor8-Bay
  • Port count1 × 10GbE + 2 × 1GbE
  • Power draw112 W
  • Supported standardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
  • LAN ports1 × 10GbE + 2 × 1GbE

Included HDD Capacity 64TB (4 x 16TB)

Model Partially Populated

  • Ready-to-use storage with 64 TB pre-installed drives
  • Native 10 GbE port enables high-speed file transfers
  • Quad-core 2.04 GHz processor with 8 GB DDR4 memory
  • RAID 0, 1, 5, 6, 10 and JBOD for data protection
  • VMware and Windows Server 2022 certified for virtualization

Ready-to-use 8-bay NAS for small teams

The Buffalo TeraStation 5820 ships with four 16 TB NAS-grade drives pre-installed and RAID-configured, delivering 64 TB of protected capacity out of the box. An Annapurna Labs AL524 quad-core processor at 2.04 GHz and 8 GB of DDR4 memory handle file serving, virtualization and backup workloads for businesses that need immediate storage without drive sourcing or array setup.

112 W peak draw with standard office cooling

The unit operates from a 100-240 VAC supply and consumes up to 112 W under typical load while staying within a 0-40 °C ambient range. Front-panel LEDs show power, drive and 10/100 LAN status so administrators can verify health at a glance without opening the chassis.

Native 10GbE plus USB expansion built in

A single 10GbE RJ-45 port and two 1GbE ports provide high-speed LAN connectivity without adapter cards, while two USB 3.0 and two USB 2.0 ports allow direct attachment of external backup targets or UPS signalling. The bundle includes a quick setup guide, AC cable, front-panel key and warranty statement for first-day deployment.

How it compares

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

Price $2,042.99
Pricier than about 81% 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 nameTS5820DN6404
Part numberTS5820DN6404
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 interface8 x SATA (8 x Bay)
Drives included64 TB (4 × 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 + 2 × 1GbE
LAN ports1 × 10GbE + 2 × 1GbE
USB ports2 x USB3.0 + 2 x USB2.0
Power
Power draw112 W
Power details100-240 VAC 50/60 Hz
Size & build
Form factor8-Bay
Product dimensions9.06 × 11.81 × 8.46 in
Product weight23.7 lb (10.8 kg)
Shipping weight10.80 kg
Package size419 × 351 × 351 mm
Compatibility
Compatible drivesOP-HD16.0N
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

How do I install the 16TB drives and what step is often missed?

The four 16TB drives ship pre-installed in the 8-bay chassis with RAID pre-configured; the step often missed is inserting the front-panel key to lock the drive trays before powering on.

What maintenance or replacement will the 16TB drives need later?

The OP-HD16.0N drives are the only compatible spares; plan to replace any drive that SMART reports as failing and rebuild the RAID 5, 6 or 10 array using a matching 16TB unit.

What limit appears first during sustained 10GbE transfers?

The 112W power envelope and 0–40°C operating range constrain sustained write throughput before the AL524 quad-core or 8GB DDR4 memory become bottlenecks.

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