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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)
UnionSine

UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC

Bottom line: The UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB ($39.89 on Amazon as of 2026-10-07): 750GB clears Sony's 250GB minimum for PS4 external game storage; main trade-off: spinning HDD, so far slower than any USB 3.0 SSD.

$39.89

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Buy on Amazon — $39.89 Compare to similar external storage

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.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 750GB clears Sony's 250GB minimum for PS4 external game storage
  • ✓ Rated 125-137MB/s read, 103MB/s write over USB 3.0
  • ✓ JMicron 578 controller runs the drive silent under load
  • ✓ 0.32 lb and pocket-slim, no external power brick needed
  • ✓ Three-year manufacturer warranty plus free technical support

Cons

  • ✗ Spinning HDD, so far slower than any USB 3.0 SSD
  • ✗ 750GB fills fast with modern 100GB+ console installs
  • ✗ PS4 loses wifi connection after recognizing the drive
  • ✗ May need a PS4 firmware update before it is recognized

Manufacturer description

The UnionSine HD-2510 is a 750GB portable external hard drive built for people who need pocketable capacity without paying SSD prices. At 0.32 lb and slim enough for a jacket pocket, it pairs a USB 3.0 thickened copper-core cable with a JMicron 578 controller that UnionSine rates at 125-137MB/s read and 103MB/s write. That controller is also why the drive runs silent, and the aluminum anti-interference wrap around the chip handles heat dissipation while a separate signal shielding layer keeps transfers stable. Compatibility is the reason this UnionSine drive shows up in so many console…

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SpecPicks Verdict

SpecPicks scored UnionSine 750GB 2.5" Ultra Slim Portable External Hard Drive HDD-USB… using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. UnionSine'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

Will this work with a PS4?

Yes. Sony requires 250GB or more for external game storage and this drive is 750GB. Note that per UnionSine, the PS4 cannot connect to wifi after recognizing the drive, and older firmware may need updating before the console sees it.

How fast is it?

UnionSine rates the theoretical read speed at 125-137MB/s and write speed at 103MB/s over the included USB 3.0 thickened copper-core cable. Real-world speeds vary by file size and host port.

Do I need to install any software?

No. It is plug and play with no software to install. It works with Windows, Mac, Linux, and Android, though Mac users typically reformat NTFS-shipped drives for full read-write support.

What comes in the box?

One portable hard drive, one USB 3.0 cable, and one user manual, in gift-type shell packaging. There is no separate power adapter because the drive is bus-powered over USB.

Is there a warranty?

UnionSine lists a three-year manufacturer's warranty with free technical support. Check the current product listing to confirm the terms that apply to your purchase.

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

ASINB091FS4R1D
BrandUnionSine
ColorBlack
SeriesHD2510
Hard Drive750 GB Mechanical Hard Disk
Item Weight7.7 ounces
ManufacturerUnionSine
Model NumberHD2510
Special FeaturePortable, 3 Year Warranty
Flash Memory Size750 GB
Hardware PlatformMac/Linux, Windows, Android
Installation TypeExternal Hard Drive
Item model numberHD2510
Compatible DevicesPS4, Laptop, Desktop, xbox
Product Dimensions4.56 x 3.15 x 0.5 inches
Hard Disk InterfaceUSB 3.0
Date First AvailableMarch 31, 2021
Hard Drive InterfaceUSB 3.0
Item DimensionsLxWxH4.56 x 3.15 x 0.5 inches
Hard Disk DescriptionMechanical Hard Disk
Full listing titleUnionSine 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)

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 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.

Buy on Amazon — $39.89

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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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)
$39.89
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