A. 1. Check storage space: Ensure that the SD card has enough space for recording. If it is full, delete unnecessary files or replace it with a larger capacity card. 2. Review recording settings: Open the app and navigate to 'Settings' > 'Recording' to ensure that recording is enabled and configured correctly. 3. Restart the camera: Power off the camera and turn it back on to reset its functions.

B. 4. Test recording in different modes: If the camera has multiple recording modes (e.g., continuous, motion-triggered), test each mode to see if one works better than the others.