I need help updating my Phantom 3 Pro firmware. My controller won't connect to my iPhone 11 pro max and so I downloaded the newest firmware to an SD card and tried to update the aircraft that way. Then I was going to connect the aircraft to the controller by the USB cable to see if that will fix everything but when I put the SD card into the aircraft it blinks red and green for a few minutes before it goes to solid red and does nothing. Does anyone know how to fix this

I need help updating my Phantom 3 Pro firmware. My controller won't connect to my iPhone 11 pro max and so I downloaded the newest firmware to an SD card and tried to update the aircraft that way. Then I was going to connect the aircraft to the controller by the USB cable to see if that will fix everything but when I put the SD card into the aircraft it blinks red and green for a few minutes before it goes to solid red and does nothing. Does anyone know how to fix this