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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

  • 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 48TB (4 x 12TB)

Model 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.

How it compares

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

Price $1,919.99
Pricier than about 81% of the 230 comparable items (median $562.49).

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Specifications

Product
Brand nameBUFFALO
Product lineTeraStation 5020
Model nameTS5820DN4804
Part numberTS5820DN4804
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 included48 TB (4 × 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 + 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 weight10.89 kg
Package size419 × 351 × 351 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

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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