#2 Why the screen shows "SD card error" ?
Class 10, U3 Speed Micro-SD Card for 4K Video is required. We Recommend SAMSUNG Class 10, U3 Speed Micro-SD Memory Card.
Please DON’T USE any “SanDisk Ultra” or other "Generic Class 10" Cards from third-party sellers. They are NOT made for 4K Ultra-HD high-end dash cam like this one.