I bought a USB flash drive off of Ali Express, and it was fine. Here’s how you can check yours.

Amin Shah Gilani
1 min readOct 30, 2018

There are plenty of stories about fraudulent USB flash drives floating around. This isn’t one of those, I bought a 128 GB USB 3.0 Type C & A SanDisk Flash Drive, and it works great. If you want to buy the drive, click here. I am not affiliated with the seller, I get no referral commission for this link.

The device I recieved

You should reproduce these tests for every suspect USB you buy as well. The tool I used is f3 (Fight Flash Fraud), and it tests the device’s real:

  • Write Speed — 43.33 MB/s
  • Read Speed—112.24 MB/s
  • Capacity—114.53 GB

These numbers, while fairly high, nowhere near the levels written on the packaging, but I’m okay with that. Realistic benchmarks are never as high as theoretical.

My tests were conducted over the USB C interface, while connected directly to a 2016 Macbook Pro. Here are the raw results:



Amin Shah Gilani

Founder. Developer. Spaces over tabs. Atom over your favorite X.