f3: f3 (Fight Fake Flash) f3: f3: f3 is a simple tool that tests flash cards capacity and performance to f3: see if they live up to claimed specifications. It fills the device f3: with pseudorandom data and then checks if it returns the same on f3: reading. f3: f3: F3 stands for Fight Flash Fraud, or Fight Fake Flash. f3: f3: Homepage: https://github.com/AltraMayor/f3 f3: