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Buffalo

BUFFALO TeraStation WS5420RN 4-Bay Windows Server IoT 2025 Rackmount NAS 16TB (4x4TB) HDD Included TAA Compliant

$3,199.99
$2,335.68 SAVE $864.31
None availableas of 08/15/2026

Ships when available. Free shipping on most items when you spend $100 or more.

Compliance, certifications and origin

  • TAA compliant
  • Origin: Japan
Rated excellent by our customers Read our reviews

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

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Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

TeraStation WS5020 Windows Server IoT Network Attached Storage devices are purpose-built as efficient data storage and backup solutions for small businesses. These devices run on the Windows Server IoT 2019 operating system, which is a binary equivalent to Windows Server 2019, and integrate seamlessly into Windows-based environments as well as with various Microsoft services such as Azure and OneDrive. This Windows Server version is only available on NAS through the OEM.

The TeraStation NAS offers flexibility to be used as you see fit, such as acting as a multi-purpose file server, a central backup hub for all your files (including backing up to and from cloud services), being set up as a NVR server for security cameras, or serving as a subscription-free backup and disaster recovery (BDR) appliance.

More from the manufacturer

Technical specifications

General Information

Manufacturer Buffalo Americas, Inc
Manufacturer Part Number WS5420RN16W5
Manufacturer Website Address http://www.buffalotech.com
Brand Name Buffalo
Product Line TeraStation
Product Series WS5020
Product Model WS5420RN16W5
Product Name TeraStation WS5420RN16W5 SAN/NAS Storage System
Product Type SAN/NAS Storage System

Storage

Number of Hard Drives Supported 4
Number of Hard Drives Installed 4
Total Hard Drive Capacity Supported 48 TB
Total Hard Drive Capacity Installed 16 TB
Hard Drive Interface Serial ATA/600
Hard Drive Configuration 4 x 4TB

Processor & Chipset

Processor Manufacturer Intel
Processor Type Atom
Processor Model C3338
Processor Core Dual-core (2 Core)
Processor Speed 1.50 GHz

Memory

Standard Memory 8 GB
Memory Technology DDR4 SDRAM

Network & Communication

Ethernet Technology 10 Gigabit EthernetGigabit Ethernet

I/O Expansions

Number of Total Expansion Bays 4

Controllers

Controller Type Serial ATA/600
RAID Supported Yes
RAID Levels 0, 1, 5, JBOD

Interfaces/Ports

Drive Interface Serial ATA/600
Total Number of USB Ports 3
Number of USB 3.0 Ports 3
Network (RJ-45) Yes
Number of Network (RJ-45) Ports 3

Software

Operating System Windows Server IoT 2025
Operating System Supported Windows 11Windows 10Windows 10 x64Windows 8.1Windows 8.1 x64Windows 7Windows 7 x64Windows Server 2022Windows Server 2016Windows Server 2019Windows Server 2012Windows Server 2012 R2Mac OS X 10.12 Sierra

Management & Protocols

Protocols iSCSITCP/IPCIFS/SMBAFPFTPSFTPNFSSNMP

Physical Characteristics

Height 1.7"
Width 16.9"
Depth 16.9"
Form Factor Rack-mountable

Miscellaneous

Package Contents
  • TeraStation WS5420RN16W5 SAN/NAS Storage System
  • AC Cable
  • 6a Ethernet Cable
  • Warranty Statement
  • Quick Setup Guide
  • Setup Media (SD Card)
  • Rail Kit with Mounting Brackets and Screws
Country of Origin Japan
TAA Compliant Yes

Warranty

Limited Warranty 3 Year

Ratings and reviews

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Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

Need to send it back? Start a return online with a Request RMA and our team will take care of you. Keep the original packaging. Items must be returned in the condition received.

Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.