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UnionSine 500GB Ultra Slim Portable External Hard Drive — main product image
UnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine

UnionSine 500GB Ultra Slim Portable External Hard Drive

A pocket-sized 500GB portable drive that pairs USB 3.0 speeds up to 125MB/s with a fanless JMicron 578 solution for quiet, plug-and-play storage

$37.46*$39.43Save 4%
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*Price sourced from Amazon.com. Last updated:Aug 18, 2026.Price and availability are subject to change — details.

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Overview

The UnionSine 500GB Ultra Slim portable drive aims squarely at buyers who want dependable expansion storage without carrying a bulky enclosure. This upgraded version combines a mirror logo strip with a striped non-slip surface, and the strips themselves are described as serving a heat-dissipation role during transfers. Rounded corners round out an intentionally hand-friendly shape. It is a drive built for people who shuttle photos, documents, and media between machines and simply want it to work the moment it is connected.

Under the shell sits a JMicron 578 solution, which UnionSine credits for both the drive's quiet operation and its transfer performance. Over USB 3.0, the manufacturer quotes theoretical read speeds up to 125MB/s and write speeds up to 103MB/s, with backward compatibility for USB 2.0 connections. The hard disk chip is wrapped in an aluminum anti-interference layer intended to improve cooling and safeguard data. Setup is genuinely minimal: there is no software to install, so the drive is ready as soon as it is plugged in.

Ownership details are straightforward. The box includes the drive, a USB 3.0 cable, and a user manual, presented in gift-type shell packaging. UnionSine backs it with a three-year warranty and free technical support, which lends some reassurance for a storage purchase at this capacity.

Key Features

【Upgraded version】 - The mirror logo strip is combined with the striped non-slip design. The rounded corners of the shell are more suitable for holding. The strips play a heat dissipation function to ensure a stable and fast transmission process.

【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.

【Ultra-Fast Data Transfers】 - Pairing this external hard drive with JMicron 578 solution USB 3.0 and USB 2.0 interfaces enables blazing-fast data transfer. It boasts theoretical read speeds of up to 125MB/s and write speeds of up to 103MB/s.

【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.

【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.

Specifications

Brand
UnionSine
Manufacturer
Unionsine
Capacity
500GB
Drive Type
Portable External HDD
Interface
USB 3.0 (USB 2.0 compatible)
Controller Solution
JMicron 578
Rated Read Speed
Up to 125MB/s
Rated Write Speed
Up to 103MB/s
Setup
Plug and play, no software required
In the Box
Drive, USB 3.0 cable, user manual
Warranty
Three-year manufacturer warranty

Frequently Asked Questions

UnionSine quotes theoretical read speeds up to 125MB/s and write speeds up to 103MB/s via its JMicron 578 USB 3.0 solution. Real-world speeds vary with your files and computer.
No. It is plug and play with no software to install, so the drive is ready to use the moment you connect it to a compatible port.
Yes. Its motherboard uses the JMicron 578 noise-free solution, which UnionSine says delivers quiet operation for a distraction-free working environment.
Yes. The drive supports both USB 3.0 and USB 2.0 interfaces, though connecting through USB 2.0 will limit transfer speeds compared with a USB 3.0 connection.
You get the portable hard drive, a USB 3.0 cable, and a user manual in gift-type packaging, backed by a three-year manufacturer warranty and free technical support.

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