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BUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB (4x12TB) with Hard Drives Included RAID iSCSI Network Storage File Server
BUFFALO

BUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB (4x12TB)

Bottom line: The BUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB is a specs-and-price decision rather than a crowd-consensus one in the external storage category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Made in Japan – Quality made data storage and fully TAA compliant.
  • ✓ Backed by BUFFALO's warranty and support channels

Cons

  • ✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

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SpecPicks Verdict

SpecPicks scored BUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. BUFFALO's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Full-Scale Professional Network-Attached Storage – Business storage solution with hard drives included and optimized to store, share, and back up data for environments of any size.
  • Advanced Hardware and Firmware – Product designed for stability and security, capable of handling heavy data loads without dropping performance.
  • Purpose-Built for Data Protection – Secure NAS on closed system with 256-bit drive encryption, two-factor authentication, and flexible backup features to keep your data safe.
  • Snapshots for Instant Data Backup and Recovery – Snapshots can be created and used to recover data near instantaneously, with little or no system disruptions, and mitigate ransomware.
  • Fast Data Transfers – Native 10GbE port for high-speed file transfers with no cable upgrade needed.
  • Cloud Integration – Sync with Dropbox, Amazon S3, and Microsoft Azure and OneDrive to create a hybrid cloud for extra data security, cost savings, and versatile data backup.

Full Specifications

BrandBUFFALO
ColorBlack
Model NameTeraStation 5020
Unit Count1 Count
Form FactorRack-mountable
Model NumberTS5420RN4804
Built-In MediaTeraStation 5420RN NAS, Rail kit, Quick Setup Guide, 5e Ethernet Cable, AC Cable, Front Panel Key, and Warranty Statement
Hard-Drive Size48 TB
Mfr Part NumberTS5420RN4804
Number of Items1
Special FeaturePortable
Hardware PlatformBuffalo
Installation TypeEthernet NAS Device
Compatible DevicesDesktop
Data Transfer Rate5 gigabits_per_second
Enclosure MaterialMetal, Hard Drive Disk
Additional FeaturesPortable
Hard Disk InterfaceSerial ATA-600
Warranty Description3 year manufacturer warranty with registration
Hard Disk Description4x12TB
Full listing titleBUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB (4x12TB) with Hard Drives Included RAID iSCSI Network Storage File Server

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BUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB (4x12TB) with Hard Drives Included RAID iSCSI Network Storage File Server is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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BUFFALO TeraStation 5420RN 4-Bay Business Rackmount NAS 48TB (4x12TB) with Hard Drives Included RAID iSCSI Network Storage File Server
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