# AltraMayor/f3

F3 - Fight Flash Fraud

Repository: https://github.com/AltraMayor/f3
Canonical: https://ross.abutalabs.com/products/f3
Homepage: https://fight-flash-fraud.readthedocs.io/en/stable/
Language: C
License: GPL-3.0
License Family: copyleft
Topics: fake-flash, flash-test
Last push: 2026-08-24T17:52:18+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 49, longevity 100
- inputs: {"age_days": 5376, "days_push": 9, "days_rel": 124, "gap_med": 400, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3358, forks 176 (observed 2026-08-28T04:07:57.932780+00:00)

## What it is
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
- artifact type: cli-tool
- maturity: stable
- function: developer-tools, file-system, benchmarking
- domain: developer-tools, hardware
- platform: windows, cli, cross-platform
- tags: fake-flash, usb-drives, sd-cards, storage-testing, hardware-diagnostics, command-line, linux, macos

## Member repositories
- AltraMayor/f3 (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:57.932780+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:40:53.702605+00:00, confidence not recorded.
  - readme: https://github.com/AltraMayor/f3 (fetched 2026-08-28T04:07:57.932780+00:00, sha 61b7799b0f71)
- Data as of 2026-08-30T08:39:29.467469+00:00.