/mnt/media_rw/udisk/h/update.zip
If your car stereo is not detecting your update file, you can manually create this directory structure on your USB drive to force recognition:
: Ensure the firmware is compatible with your specific model (e.g., PX6, T3, or YT9218). Installing the wrong version can "brick" the unit, making it unusable.
It looks like you've provided a file path:
: A subdirectory typically associated with external media permissions, allowing the system to read and write to the connected USB.