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Deal.ai › Buffalo › Network Attached Storage
Buffalo
Buffalo TeraStation WS5420RN 4-Bay Windows Server IoT 2025 Rackmount NAS 16TB (4x4TB) HDD Included TAA Compliant

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

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$3,575.90at WalmartChecked Nov 9

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Price facts

  • Last seen at $3,575.90 at Walmart on Nov 9.

Our take on the Buffalo TeraStation WS5420RN 4-Bay Windows Server IoT 2025 Rackmount NAS 16TB (4x4TB) HDD Included TAA Compliant

The TeraStation WS5420RN is a 1U rackmount NAS that runs Windows Server IoT 2025 instead of a locked-down NAS operating system. It ships with four 4TB drives installed, an Intel Atom C3338 dual-core CPU and 8GB of DDR4 memory, and supports RAID 0, 1, 5 and JBOD across its four bays. Three RJ-45 ports (10GbE and Gigabit) and three USB 3.0 ports give it more networking headroom than most four-bay NAS boxes at this tier. It suits small offices that want Windows file sharing, Active Directory and iSCSI without building a server, and it is TAA compliant.

Best forSmall offices needing Windows-native file sharingIT teams that want iSCSI targets for virtualizationRack cabinets with limited depth and 1U of spaceBuyers with TAA compliance requirements
Pros
  • Full Windows Server IoT 2025, not a proprietary NAS OS
  • 10 Gigabit Ethernet plus two more RJ-45 ports
  • 8GB DDR4 memory and a dual-core Atom CPU
  • Four drives preinstalled, expandable to 48TB
  • Rack rail kit and setup media included
  • TAA compliant
Cons
  • Atom C3338 is modest for heavy virtualization or many users
  • Windows Server licensing and patching add admin overhead
  • Only four bays, so expansion means replacing drives
  • No NVMe or M.2 cache slots listed

Buffalo TeraStation WS5420RN 4-Bay Windows Server IoT 2025 Rackmount NAS 16TB (4x4TB) HDD Included TAA Compliant prices at every store

  • WalmartNew

    In stockSold by antonline.comReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $3,575.90Free shippingChecked Nov 9
    Visit Walmart

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

The Buffalo TeraStation WS5420RN is a 4-bay rackmount NAS that runs Windows Server IoT 2025. It comes with four 4 TB hard drives installed, for 16 TB of total capacity. It supports up to 48 TB.

It uses an Intel Atom C3338 dual-core processor at 1.50 GHz with 8 GB of DDR4 SDRAM. Storage supports RAID levels 0, 1, 5 and JBOD. Network connections include 10 Gigabit Ethernet and Gigabit Ethernet.

The unit is rack-mountable and ships with a rail kit. It is TAA compliant and made in Japan.

Drive bays
4 bays, all with drives installed
Installed storage
4 x 4 TB, 16 TB total
Max capacity
48 TB
Drive interface
Serial ATA/600
RAID
0, 1, 5, JBOD
Processor
Intel Atom C3338, dual-core, 1.50 GHz
Memory
8 GB DDR4 SDRAM
Operating system
Windows Server IoT 2025
Ethernet
10 Gigabit Ethernet, Gigabit Ethernet
Ports
3 x USB 3.0, 3 x RJ-45 network
Protocols
iSCSI, TCP/IP, CIFS/SMB, AFP, FTP, SFTP, NFS, SNMP
Compatibility
Windows 11, Windows 10, Windows 8.1, Windows 7, Windows Server 2022, 2019, 2016, 2012, 2012 R2, Mac OS X 10.12 Sierra
Form factor
Rack-mountable
Dimensions
16.9" W x 16.9" D x 1.7" H
TAA compliant
Yes
Country of origin
Japan
Warranty
3-year limited warranty
In the box
TeraStation WS5420RN16W5 SAN/NAS storage system, AC cable, Cat 6a Ethernet cable, warranty statement, quick setup guide, setup media (SD card), rail kit with mounting brackets and screws

Specifications

size
16 TBSource

Questions and answers

What makes this different from a Synology or QNAP NAS?
It runs Windows Server IoT 2025, so you manage it with Windows tools, join it to Active Directory and run Windows-compatible software. Synology and QNAP use their own NAS operating systems with app stores.
Can I use it as an iSCSI target for VMware or Hyper-V?
Yes. It supports iSCSI alongside CIFS/SMB, NFS, AFP, FTP and SFTP, so it can present block storage to virtualization hosts.
How much total capacity can it hold?
It ships with 4 x 4TB drives for 16TB raw and supports up to 48TB across its four bays. RAID 5 leaves you with the capacity of three drives.
Does it work with Macs?
Yes. It lists Mac OS X 10.12 Sierra support and AFP and SMB protocols, alongside Windows 7 through 11 and Windows Server 2012 through 2022.
What is in the box?
The unit with four drives, an AC cable, a 6a Ethernet cable, a rail kit, a quick setup guide, setup media on an SD card and a warranty statement.
Is it TAA compliant?
Yes, Buffalo lists this model as TAA compliant, which matters for US government and public-sector procurement.
Where is the Buffalo TeraStation WS5420RN 4-Bay Windows Server IoT 2025 Rackmount NAS 16TB (4x4TB) HDD Included TAA Compliant cheapest?
At Walmart, for $3,575.90, as of our latest check.

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