I recently purchased a 4K camera for my P3A and I'm having trouble loading the pro firmware onto the bird. I've tried multiple verisons of the firmware and so far I've only gotten it to start the firmware update once. When it was completed there was no .txt file on the card and every attempt since has resulted in the bird booting up as it should and the only thing not functioning on it is the sd card. It says its protected with every card I've tried it on.