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UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB 3.0… 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.

UnionSine

750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one,Xbox 360-HD-2510(Black)

Name: UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one,Xbox 360-HD-2510(Black)
Brand: UnionSine
SKU: B091FS4R1D
Price: 39.89 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$39.89

Buy on Amazon — $39.89 Compare to similar external storage

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

Bottom line: The 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one,Xbox 360-HD-2510(Black) is a niche pick — read recent reviews before buying in the external storage category, priced around $39.89. Read recent reviews carefully before committing.

UnionSine's enclosure is designed with cool brushed stripe design and rounded radians, with a comfortable feel.Easy to carry, the slim body weighs only 0.32 lb, giving you the ultimate enjoyment Compatibility compatible system: Windows / Mac / Linux / Android，Compatible Equipment:PC/Laptop/PS4/Xbox/TV. For PS4, Xbox, please purchase products with a capacity of 250GB or more，PS4 cannot connect to wifi after recognizing the external hard drive.If it is not compatible, please upgrade the PS4 firmware. USB3.0 high-speed transmission USB 3.0 ultra-high-speed USB connection, can transfer data at…

SpecPicks Verdict

SpecPicks classifies UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB… 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. UnionSine'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 UnionSine'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

Key Features

【Ultra-Fast Data Transfers 】- The external hard drive works with the USB 3.0 thickened copper core cable to provide super fast transfer speed. The theoretical read speed is as high as 125MB/s-137MB/s, and the write speed is as high as 103MB/s.
【Ultra-thin and quiet】-The motherboard adopts JMicron 578 noise-free solution, giving you a quiet working environment. Lightweight and portable size designed to fit in your pocket for easy portability.
【Compatibility】Compatible with PS4/xbox one/Windows/Linux/Mac/Android / stable and fast loading on game consoles no difference from fast transmission when using on PC
【Plug and Play】 - With no software to install, just plug it in and the drive is ready to use.The hard disk chip is wrapped with an aluminum anti-interference layer to increase heat dissipation and protect data
【Double anti-interference】-The external hard drive chip adds a signal shielding layer, the transmission speed of the hard disk will be faster than other hard disks, stable and undisturbed
【What You Get 】- 1 x Portable Hard Drive, 1 x USB 3.0 Cable, 1 x User Manual, Gift-type shell packaging ,Three-year manufacturer's warranty and free technical support services

Full Specifications

ASIN	B091FS4R1D
Brand	UnionSine
Color	Black
Series	HD2510
Hard Drive	750 GB Mechanical Hard Disk
Item Weight	7.7 ounces
Manufacturer	UnionSine
Model Number	HD2510
Special Feature	Portable, 3 Year Warranty
Flash Memory Size	750 GB
Hardware Platform	Mac/Linux, Windows, Android
Installation Type	External Hard Drive
Item model number	HD2510
Compatible Devices	PS4, Laptop, Desktop, xbox

Ready to buy?

UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one,Xbox 360-HD-2510(Black) 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.