Problem of saving calibration parameters in mission planner

I have a pixhawk4 , with flysky fs-i6X RC , and i am trying to calibrate its components , compass , Accelerometer , RC , ESC using mission planner it all worked well but i am having a problem with saving the configuration of it , as soon as i turn off the pixhawk 4 all configuration is lost and i have to do it all over again. I’ve tried “save to file” in the config tab and i uploaded it but it didn’t work . I want to know how to save the calibration once and for all without redoing it again ?

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I have the same issue. Did you ever resolve it, by chance?