To update the firmware of your aircraft, remote controller (RC), and D-RTK 2 Mobile Station, connect the aircraft to a computer and use DJI Assistant 2 For Enterprise.
For updating the firmware of the aircraft, remote controller (RC), and BS30 Intelligent Battery Station, you can utilize the DJI Pilot 2 App. Alternatively, you can download the firmware package from the DJI website (hyperlink provided) and perform an offline update by inserting the SD card with the firmware into the aircraft.
For detailed instructions, please refer to the User Manual.