Drive Capacity Tester App Icon

Drive Capacity Tester

Drive Capacity Tester can verify the manufacturer's specified size of USB sticks and SD cards. Counterfeit storage media can be found quickly.

App Features

Below you will see some of the key features of the app.

Verify USB Drives

Drive Capacity Tester can determine the true size of a USB stick or SD card. Recognize fake cards with incorrectly specified size.

Easy to use

The app lists all drives and updates itself automatically. Start the test with just two clicks.

Parallel Tests

Start several tests at the same time with the Pro version and save valuable time.

Continue Tests

Continue tests started with the Pro variant. So you don't have to leave the computer on for several hours.

Modern User Interface

The user interface is minimalist and focuses on the essentials - but still looks very modern.


Klicke auf den Screenshot, um ihn zu vergrößern. Um weitere Screenshots zu sehen, kannst du den App Store öffnen.

Verify the true size of usb sticks.


This app is compatible with the following version of macOS:

macOS 11.0 Big Sur

Big Sur

macOS 12.0 Monterey


macOS 13.0 Ventura


What People Are Saying

Found one Fake USB drive
I bought an USB drive off of ebay. The stick was very cheap and it turned it that it was a fake. This app is very useful. Recommended.
Simple to use
It turns out that all my expensive USB sticks are fine and the one cheap stick was a fake. Nice app.
Nice app
Recommended. Thankfully all my sticks were fine but my cheap SD card is a fake 😂

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