Is there a way to update the firmware on the DJI Mini 2 through sd card? My charging port is broken, can't charge and can't open files.

Hi there. Thank you for reaching out and we do apologize for the trouble. Unfortunately, we don't have the option to perform a firmware update via an SD card. The DJI Mini 2 can only perform a firmware update via the DJI Fly app and DJI Assistant 2 (software configuration). In this case, I'm afraid that you may consider sending the unit in for a proper diagnosis. You can contact our support team to start up a ticket at https://www.dji.com/support . Thank you for your understanding and support.