ADATA

ADATA HD650 4TB USB 3.1 Shock-Resistant External Hard Drive, Black (AHD650-4TU31-CBK)

Name: ADATA HD650 4TB USB 3.1 Shock-Resistant External Hard Drive, Black (AHD650-4TU31-CBK)
Brand: ADATA
SKU: B073YSQNCY

Status: ADATA HD650 4TB USB 3.1 Shock-Resistant External… (4TB hard drive): Unavailable on Amazon as of 2026-10-18 10:27 UTC. SpecPicks has no in-stock 4TB hard drive on file; an Amazon search for "4TB hard drive" lists current offers with the same specs. eBay sellers may still list this model new or used.

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Bottom line: The ADATA HD650 4TB USB 3.1 Shock-Resistant External Hard Drive: Full 4TB on a single portable volume, no external power brick; main trade-off: spinning HDD, so far slower than an SSD for random file access.

Unavailable on Amazon as of 2026-10-18 10:27 UTC

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-18

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. About the author →

Pros & Cons

Pros

✓ Full 4TB on a single portable volume, no external power brick
✓ Shock-resistant housing built for bag-to-bag transport
✓ AES 256-bit hardware-class encryption for sensitive archives
✓ USB 3.1 interface, backward compatible with USB 2.0 ports

Cons

✗ Spinning HDD, so far slower than an SSD for random file access
✗ Scratch-resistant coating is a surface finish, not drop-proofing
✗ No stated IP rating for dust or water resistance
✗ Encryption depends on ADATA's bundled software, not OS-native

Manufacturer description

The ADATA HD650 is a 4TB portable hard drive built for people who move their backups around rather than leave them parked on a desk. Its shock-resistant shell is designed to absorb unexpected impacts, and the scratch-resistant surface keeps the finish intact after repeated trips in and out of a bag. Connectivity runs over USB 3.1, which ADATA notes delivers transfer speeds several times faster than the USB 2.0 external drives it replaces, while staying backward compatible with older USB 2.0 machines so you can still pull archives off legacy systems. Because it is a standard USB mass-storage…

SpecPicks Verdict

SpecPicks scored ADATA HD650 4TB USB 3.1 Shock-Resistant External Hard Drive using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. ADATA'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.

Frequently Asked Questions

Does the ADATA HD650 4TB work with a Mac?

Yes. ADATA lists the USB 3.1 interface as compatible with PC, Mac, and Linux. As with most portable HDDs shipped NTFS-formatted, plan to reformat to a Mac-friendly filesystem if you want write access.

Is the HD650 an SSD or a spinning hard drive?

It is a portable HDD, not an SSD. ADATA describes it as a shock-resistant USB 3.1 portable hard drive, which is why 4TB lands at a different price point than SSD pricing.

Will it work on an older laptop with only USB 2.0?

Yes. ADATA states the HD650 is backward compatible with devices supporting only USB 2.0, though transfer speeds drop to USB 2.0 levels rather than the full USB 3.1 bandwidth.

How does the encryption work?

The HD650 offers 256-bit AES encryption to protect valuable and sensitive data. Check the product listing for the current bundled utility and supported operating systems before relying on it for compliance work.

What warranty does ADATA include?

ADATA lists a 3-year warranty on the HD650. Confirm warranty terms on the product listing before purchase.

Key Features

USB 3.1 Interface that works with PC, Mac, Linux
Shock-Resistance
Scratch-resistance surface
AES 256 Encryption
3 Year Warranty

Full Specifications

Brand	ADATA
Color	Black
Model Name	ADATA HD650
Read Speed	90 megabytes_per_second
Form Factor	Portable
Media Speed	80-90 megabytes_per_second
Connectivity	USB
Model Number	AHD650-4TU31-CBK
Compatibility	PC, Mac, Linux
Built-In Media	External HDD, Quick Start Guide
Item Type Name	ADATA USB 3.1 Shock-resistance Portable External Hard Drive, Black (AHD650-4TU31-CBK)
Hard-Drive Size	4000 GB
Mfr Part Number	AHD650-4TU31-CBK
Number of Items	1
Special Feature	Scratch-resistance
Hardware Platform	PC; Mac;Linus
Installation Type	External Hard Drive
Compatible Devices	Desktop
Data Transfer Rate	5 gigabits_per_second
Enclosure Material	Plastic

Ready to buy?

Amazon shows no buyable offer for ADATA HD650 4TB USB 3.1 Shock-Resistant External… at the last check. An Amazon search for "4TB hard drive" lists current offers. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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