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

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: 193.00 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$193.00

Buy on Amazon — $193.00 Compare to similar external storage

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.

Bottom line: The 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 $193.00. Read recent reviews carefully before committing.

Capacity: 4.0TB; [Compatible models] USB3.1 (Gen1) /USB3.0/2.0 Windows PC and Mac equipped with a Type-A terminal, corresponding OS: Windows 10 / 8.1 / 7, Mac OS X 10.11 or later; [ compatible TV] sharp "Aquos", Sony "BRAVIA", Panasonic "VIERA", Hisense, Toshiba "REGZA", FUNAI, Orion, Mitsubishi Electric, LG Electronics, Hitachi "Wooo", PIXELA, DX antenna, Dion (of compatible models see manufacturer HP details); [connection standard] USB3.1 (Gen1) /USB3.0/2.0; [size] dimensions (width × height × depth): 114 × 33 × 171mm ※ body only (protrusion except), weight: about 900g; power: AC power…

SpecPicks Verdict

SpecPicks classifies Buffalo USB 3.1 (Gen 1)/USB 3.0 External hard drive HDD HD – adu3… as a niche pick — read recent reviews before buying in the external storage category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. BUFFALO's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

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

ASIN	B07BK6696F
Brand	BUFFALO
Color	Black
Model Name	HD-AD4U3
Read Speed	10 Gigabytes Per Second
Form Factor	2.5-inch
Item Weight	0.9 Kilograms
Manufacturer	BUFFALO
Model Number	HD-AD4U3
Built-In Media	Data Recovery Service, Protective Case/Bag
Hard-Drive Size	4 TB
Number of Items	1
Special Feature	Portable
Installation Type	External Hard Drive

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.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.