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