Hi, I have a model s that I bought in December 2016. I can't seem to get the dashcam to work. I bought a sandisk 64gb flashdrive formatted FAT32. I checked the properties on my computer and it is FAT32. I added a folder called TeslaCam. I plugged it into a usb port under the air vent facing the rear seat. Those are the only front facing usb ports I can find. I don't have anything labelled 12v that I can find. When I drive, the dashcam icon doesn't appear and nothing records. What am I doing wrong?