The system does not detect an SD Card.
Below are a few possible reasons why this may be occurring:
1. Please power off camera before insert SD card into camera.
2. The SD card read&write speed not good, please use a SD card with class 10 or above class 10.
3. The SD card is broken.
4. The SD card has not been formatted properly.
5. The SD card slot is malfunctioning.