Skip to main content
SSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb Drive | Support OTG Function,Fast USB A+C Memory Stick with USB C Adapter for Smartphone,Mac/iPhone 15/16/17
SSK

SSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb Drive

Bottom line: The SSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb ($85.99 on Amazon as of 2026-10-21 16:18 UTC): Up to 550MB/s read and 520MB/s write over USB 3.2 Gen2; main trade-off: peak speeds need a USB 3.2 Gen2 host; USB 3.0/2.0 ports run slower.

$85.99

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Buy on Amazon — $85.99 Compare to similar accessories

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Up to 550MB/s read and 520MB/s write over USB 3.2 Gen2
  • ✓ 512GB capacity for large video, photo and backup transfers
  • ✓ Zinc alloy shell resists drops and abrasion
  • ✓ Included USB-C adapter for phones, laptops and MacBooks
  • ✓ Backward-compatible with USB 3.0 and USB 2.0 ports

Cons

  • ✗ Peak speeds need a USB 3.2 Gen2 host; USB 3.0/2.0 ports run slower
  • ✗ Separate USB-C adapter is an extra piece that can be misplaced
  • ✗ Flip-up cap adds a moving part compared with capless designs
  • ✗ Speed figures come from SSK internal testing and vary by host

Manufacturer description

The SSK 512GB USB flash drive pairs USB 3.2 Gen2 speeds with a pocket-size zinc alloy body, so you can move large video projects, photo libraries and backups without carrying a full external SSD. SSK rates it at up to 550MB/s read and 520MB/s write. SSK describes that as about 10 times faster than a conventional USB 3.0 memory stick, and says the speed holds steady during long transfers and as the drive fills up. These figures come from SSK's internal testing, and actual speeds depend on your host device, port and usage conditions. The drive has a USB-A connector, and the included USB-C…

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored SSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb… using a rating × review-volume × price-fit model applied to published specs and reviews across the accessories category. SSK's accessories 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 accessories 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

How fast is the SSK 512GB flash drive?

SSK rates it at up to 550MB/s read and 520MB/s write over USB 3.2 Gen2, based on its internal testing. Real-world speeds vary with your host device, port and usage conditions.

Will it work with my iPhone 15 or a USB-C Android phone?

Yes. It includes a USB-C adapter and supports OTG, so you can connect it to USB-C smartphones, laptops and MacBooks to transfer photos, videos and files.

Can I use it in an older USB 3.0 or USB 2.0 port?

Yes. The drive is backward-compatible with USB 3.0 and USB 2.0 ports, but transfer speeds will be limited by the older port's bandwidth.

Does it work with smart TVs and car stereos?

SSK lists it as compatible with conventional USB-A devices, including computers, smart TVs and car audio systems, through its native USB-A connector.

How durable is the drive, and does it have a warranty?

It has a zinc alloy shell that resists drops and abrasion, plus a flip-up cap that protects the connector. SSK also lists water and dust protection. Check the product listing for current warranty terms.

Key Features

  • New Ultra-High-Speed Transmission: SSK USB 3.2 flash drive provides up to 550MB/s read speed and 520MB/s write speed which is 10 times faster than conventional USB 3.0 memory stick. And more importantly, the speed does not drop during the transmission and the condition of capacity use. It is suitable for daily movement of large-capacity files and photos. According to internal testing, performance may vary slightly due to factors such as host equipment, interfaces, and usage conditions
  • Advanced Design USB Pendrive: The exquisite and compact SSK solid state external USB thumb drive is made of high-grade zinc alloy shell, which is resistant to falling and abrasion. The cover firmly holds the USB metal port, and flip-up cap design effectively protects the USB interface
  • Safe & Reliable :This USB SSD Flash Drive can store your photos, videos, music and files quickly and safely. SSK Fast Thumb Drive have excellent shock resistance and fast heat dissipation performance, Waterproof and dustproof functions better protect your data
  • Portable&Light weight: Make your life easy With this USB Pendrive data storage, you can take this usb ssd external flash drive with you wherever you go. Advanced business portable USB drive can record your life and work at any time.
  • Excellent Compatibility: Fast speed USB stick plug and play. Come with type c adapter, this SSD External USB drive is not only applicable to conventional USB A port computer equipment, smart TV, car audio, but also suitable for USB C smartphones, Laptops and macbook; Backward-compatible with USB 3.0 and USB 2.0 ports

Full Specifications

BrandSSK
ColorGrey
Model NameSD300/512GB
Read Speed550
Write Speed520 MB/s
ConnectivityUSB-C
Model NumberSD300
CompatibilityiOS, Mac
Mfr Part NumberSD300
Number of Items1
Special FeatureCompact
Flash Memory TypeSSD
Compatible DevicesMacbook
Hardware InterfaceUSB 3.2 Gen 2
Additional FeaturesCompact
Warranty Description3 years
Compatible Phone ModelsUSB-C compatible smartphones
Connectivity TechnologyUSB
Memory Storage Capacity512 GB
Hardware Connectivity TechnologyUSB Type A, USB Type C
Full listing titleSSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb Drive | Support OTG Function,Fast USB A+C Memory Stick with USB C Adapter for Smartphone,Mac/iPhone 15/16/17

Ready to buy?

SSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb Drive | Support OTG Function,Fast USB A+C Memory Stick with USB C Adapter for Smartphone,Mac/iPhone 15/16/17 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 — $85.99

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

Related Accessories

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
SSK 512GB USB Flash Drive up to 550MB/s USB 3.2 Gen2 Externel Thumb Drive | Support OTG Function,Fast USB A+C Memory Stick with USB C Adapter for Smartphone,Mac/iPhone 15/16/17
$85.99
View on Amazon →