you have to buy a cable to be able to connect a thumbdrive (Usb Drive) to drone. you find the firmware that you want to install and place it on the thumbdrive (USB Drive) 1st turn on the drone and wait for it to beep. 2nd connect the usb drive to the drone 3rd hold the drone power button for over 10 secs at that moment you will see it blinking and turning off, wait about 8 mins to be sure install is 100% install and then enjoy