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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

  • TypeDesktop NAS
  • StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
  • Ports1 x 10GbE + 2 x 1GbE
  • Port RJ-451 x 10GbE + 2 x 1GbE
  • Port USB2 x USB3.0 + 2 x USB2.0
  • HDD Interface8 x SATA (8 x Bay)

Included HDD Capacity 64TB (4 x 16TB)

Struck-through versions exist but are not stocked here.

Option 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.

Highlights

  • 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

Specifications

BrandBUFFALO
SeriesTeraStation 5020
ModelTS5820DN6404
Part NumberTS5820DN6404
TypeDesktop NAS
StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Ports1 x 10GbE + 2 x 1GbE
Port RJ-451 x 10GbE + 2 x 1GbE
Port USB2 x USB3.0 + 2 x USB2.0
HDD Interface8 x SATA (8 x Bay)
Form Factor8-Bay
ProcessorAnnapurna Labs Alpine Processor AL524 (2.04 GHz Quad-Core)
Installed Memory8GB DDR4
Included HDD Capacity64TB (4 x 16TB)
RAIDRAID 0, 1, 5, 6, 10, and JBOD
Drive CompatibilityOP-HD16.0N
Supported ProtocolsTCP/IP
LEDsPower, HDD (Hard Disk Drive), LAN (10/100)
Power100-240 VAC 50/60Hz
Power Consumption112W
Temperature0°C - 40 °C
Humidity0-80% RH non-condensing
UsageHigh read/write performance with RAID
Dimensions9.06 x 11.81 x 8.46 in
Weight23.7 lbs
Package ContentsTeraStation, Quick Setup Guide, AC Cable, Front Panel Key, and Warranty Statement
Shipping weight10.80 kg
Package size419 × 351 × 351 mm

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

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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