Q:Keeping Saying SD Card Full? A:1. Format your new sd card on the dash cam when first use. We suggest using class 10 high speed micro sd card, no more than 32 GB. (Please remember insert sd card before dashcam power on!) 2. Please check if you set loop recording success, if set success, there will have a mark on dash cam screen. 3. Please do remember to close parking monitoring and motion detection function when you're driving on the road.