There should not be a red dot on the dashcam when you exit and close the door after parking. If there is, yours is broken. If you have Sentry active, the Sentry icon will have a red dot showing it is active when the car is parked. Also, in order to remove the dashcam USB drive, you must stop the dashcam if it is active with a red dot by pressing the dashcam icon and stopping it. The red dot disappears, and you can remove the USB drive.