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Buffalo TeraStation 5820 8-bay desktop NAS unit, black metal chassis, front drive bays visible

Buffalo Technology

Buffalo Technology TS5820DN4804 8-Bay 48TB (4x12TB) Desktop NAS

SKU CH-YAFK-CA7Q0 MPN TS5820DN4804

Eight-bay desktop NAS with four pre-installed 12 TB drives, a quad-core processor, 8 GB DDR4 memory and native 10 GbE plus dual 1 GbE 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 48TB (4 x 12TB)

Struck-through versions exist but are not stocked here.

Option Partially Populated

  • 8-bay desktop NAS with 48 TB raw capacity from four pre-installed 12 TB drives
  • Quad-core 2.04 GHz processor and 8 GB DDR4 memory for multi-tasking workloads
  • Native 10 GbE port plus two 1 GbE ports for high-speed network connectivity
  • RAID 0, 1, 5, 6, 10 and JBOD with snapshot backup and AES-256 encryption
  • VMware- and Windows Server 2022-certified for virtualisation deployments

Ready-to-deploy 8-bay NAS with drives

The Buffalo TeraStation 5020 series unit arrives with four 12 TB NAS-grade drives installed for a total of 48 TB. RAID is pre-configured so the appliance is operational immediately after network connection. It targets small-business teams that need secure file storage without a separate drive-purchasing step.

Network throughput ceiling

Two 1 GbE ports and one 10 GbE port provide the only wired uplinks. The 10 GbE link tops out at ten gigabits per second, so sustained transfers cannot exceed that rate even with faster switches. Both 1 GbE ports share the same backplane bandwidth, limiting aggregate throughput when all three ports are active simultaneously.

Fixed 8 GB DDR4 memory

The Annapurna Labs AL524 quad-core processor is paired with 8 GB of soldered DDR4 that cannot be expanded. Workloads such as heavy virtualization, large-scale deduplication or many concurrent SMB sessions will hit this ceiling. Buyers who need more RAM for caching or VM overhead must choose a different platform.

Highlights

  • 8-bay desktop NAS with 48 TB raw capacity from four pre-installed 12 TB drives
  • Quad-core 2.04 GHz processor and 8 GB DDR4 memory for multi-tasking workloads
  • Native 10 GbE port plus two 1 GbE ports for high-speed network connectivity
  • RAID 0, 1, 5, 6, 10 and JBOD with snapshot backup and AES-256 encryption
  • VMware- and Windows Server 2022-certified for virtualisation deployments

Specifications

BrandBUFFALO
SeriesTeraStation 5020
ModelTS5820DN4804
Part NumberTS5820DN4804
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 Capacity48TB (4 x 12TB)
RAIDRAID 0, 1, 5, 6, 10, and JBOD
Drive CompatibilityOP-HD12.0N
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 weight10.89 kg
Package size419 × 351 × 351 mm

Other versions of this model

5 more in the same range

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

Questions about this item

Should I pick the 48 TB model with four 12 TB drives or a differently populated version?

This SKU ships with four 12 TB NAS-grade drives pre-installed and RAID-configured, giving 48 TB raw capacity out of the box; other TS5020 models offer different drive counts or empty bays.

How does the 10 GbE port perform when the NAS is under a typical business workload?

The native 10 GbE RJ-45 port plus two 1 GbE ports connect to the Annapurna Labs AL524 quad-core processor and 8 GB DDR4, enabling high-speed file transfers and virtualization without extra networking hardware.

What does the SATA interface limit in an 8-bay desktop NAS like this?

Eight SATA bays support up to eight drives; with four 12 TB drives installed you have four free bays for future expansion, and RAID 0, 1, 5, 6, 10 or JBOD can be applied across any populated slots.

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