AltraMayor/f3

Health v2 · maintenance only

Adoption not part of the score

3358 stars · 176 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

F3 (Fight Flash Fraud) is a command-line tool that tests flash storage devices like SD cards and USB drives to detect counterfeit capacity and measure real performance. It writes pseudorandom data to the device and verifies it reads back correctly, exposing drives that falsely report larger capacity than they actually have.

Use cases

• check if a usb drive is fake capacity
• test sd card real size before trusting it
• verify flash drive actually stores what it claims
• measure read and write speed of a memory card
• detect counterfeit flash storage bought online
• recover usable space from a fake-capacity drive

When to choose

• you bought flash storage from an untrusted source and want to verify its true capacity
• you need to benchmark real-world read/write performance of SD cards or USB sticks
• you want a fast, low-write capacity probe for large drives
• you need to repartition a fake drive to its actual usable size

When to avoid

• you need a general-purpose disk health or SMART diagnostics tool
• you need f3probe/f3fix on Windows or macOS, since those extras require Linux
• you want a graphical testing interface

Facets

cli-tool · maturity stable

developer-tools file-system benchmarking developer-tools hardware windows cli cross-platform fake-flash usb-drives sd-cards storage-testing hardware-diagnostics command-line linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="AltraMayor/f3")