PX4-Autopilot/docs/en/concept/sd_card_layout.md
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Signed-off-by: Ramon Roche <mrpollo@gmail.com>
Co-authored-by: Ramon Roche <mrpollo@gmail.com>
2025-03-13 16:08:27 +11:00

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# PX4 SD Card Layout
The PX4 SD Card is used for storing configuration files, flight logs, mission information etc.
:::tip
The SD card should be FAT32 formatted for use with PX4 (this is the default for SD cards).
We recommend that you reformat cards that are using a different file system.
:::
The directory structure/layout is shown below.
| Directory/File(s) | Description |
| ----------------------- | ---------------------------------------------------------------------------------------- |
| `/etc/` | Extra config. See [System Startup > Replacing the System Startup][replace system start]. |
| `/log/` | Full [flight logs](../dev_log/logging.md) |
| `/mission_log/` | Reduced flight logs |
| `/fw/` | [DroneCAN](../dronecan/index.md) firmware |
| `/uavcan.db/` | DroneCAN DNA server DB + logs |
| `/params` | Parameters (if not in FRAM/FLASH) |
| `/dataman` | Mission storage file |
| `/fault_<datetime>.txt` | Hardfault files |
| `/bootlog.txt` | Boot log file |
[replace system start]: ../concept/system_startup.md#replacing-the-system-startup