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PX4 SD Card Layout

The PX4 SD Card is used for storing configuration files, flight logs, mission information etc.

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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
/paramsParameters (if not in FRAM/FLASH)
/datamanMission storage file
/fault_<datetime>.txtHardfault files
/bootlog.txtBoot log file