f3

v 7.2

Verifies the reliability of local storage, e.g. flash

F3 stands for Fight Flash Fraud, or Fight Fake Flash, and will tell if a flash drive reports more capacity than it actually has. It writes known data on any local storage until it is full, and in a second phase, it reads all the data back and verifies it. If the storage is reliable, no discrepancies will be found.

http://oss.digirati.com.br/f3/

To install f3, paste this in macOS terminal after installing MacPorts

sudo port install f3

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