SD Card not properly inserted: The dash cam will give you such prompts if the SD card is not inserted properly. So Ensure that the SD card is inserted in place.
2. Incompatible SD Card: The dash cam requires specific types of SD cards to function properly. If you are using an incompatible SD card, it may cause issues with the dash cam. We recommend you use a Samsung/Sandisk/Kingston Class 10 U3 or above memory card with the largest capacity of up to 256GB for the D4 dash cam.
3. Faulty SD Card: If the SD card is corrupted, it may cause the dash cam to display an error message. Try formatting the SD card or using a new one to fix the issue.
4. If none of the above steps work, please contact customer service to claim warranty for your dash cam.