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PX4-Autopilot/docs/en/concept/sd_card_layout.md
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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.
/log/ Full flight logs
/mission_log/ Reduced flight logs
/fw/ DroneCAN 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