What are the alternatives to the Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3 Series?

Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3 Series competes with other External Storage products on SpecPicks. Use our Compare tool to view specs side-by-side, or browse the full External Storage category for alternatives.

BUFFALO

Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3 Series

Name: Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3 Series
Brand: BUFFALO
SKU: B07BK6696F
Price: 204.72 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-06

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$204.72

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View Current Price on Amazon → Compare to similar external storage

*Price sourced from Amazon.com. Last updated 2026-08-17. Price and availability subject to change.

Bottom line: The Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3 Series is a niche pick — read recent reviews before buying in the external storage category, priced around $204.72. Compare close alternatives before committing.

The Buffalo adu3 Series external hard drive is a 4TB desktop-class USB drive built for people who need bulk storage that plugs into almost anything with a Type-A port. It connects over USB 3.1 Gen 1 with backward compatibility down to USB 3.0 and USB 2.0, so it works with Windows 10, 8.1, and 7 machines as well as Macs running OS X 10.11 or later without swapping cables or adapters. What sets this BUFFALO drive apart from a generic portable disk is its television recording support. It is listed as compatible with a long roster of TV brands, including Sharp Aquos, Sony BRAVIA, Panasonic…

SpecPicks Verdict

SpecPicks scored Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis 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. Mixed or limited buyer feedback at this price point — focus your evaluation on recent reviews that specifically address build quality and long-term reliability, and shortlist one or two close alternatives before deciding.

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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Backed by BUFFALO's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Full Specifications

Brand	BUFFALO
Color	Black
Model Name	HD-AD4U3
Read Speed	10 gigabytes_per_second
Form Factor	2.5-inch
Connectivity	USB
Model Number	HD-AD4U3
Built-In Media	Data Recovery Service, Protective Case/Bag
Hard-Drive Size	4 TB
Mfr Part Number	HD-AD4U3
Number of Items	1
Special Feature	Portable
Installation Type	External Hard Drive
Compatible Devices	Desktop
Data Transfer Rate	5 gigabits_per_second
Additional Features	Portable
Hard Disk Interface	USB 3.1
Hard Disk Description	usb 3 1
Hard Disk Form Factor	2.5 inches
Hardware Connectivity	USB 3.2 Gen 1

Ready to buy?

Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3 Series is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-08-17. Price and availability subject to change.