Hi there - I lost my original drone, but DJI was able to send a new one that I am now trying to pair with the original controller. When I hold down the power button on the drone to start pairing, the app isn't able to pair with it and the drone starts just flashing yellow. I've tried a couple of different things, but can't get it. Are there any tips for how to fix this? I don't have an SD card installed in the drone yet - do I need that to pair with the controller? Thanks!