I've recently replaced the camera/gimbal with a new DJI unit. Everything works great except I can't get to the microSD card to download video via the USB port on the Phantom. The Vision app can access the card, record video, format the card, etc and I can use the PT2 app on my Mac to access the controller etc so I know the microSD card is good and the USB port on the Phantom is good and the USB port/cable on my Mac are good. I've reseated the three connectors from the Phantom to the camera/gimbal with no change in behavior. Any ideas?