When I'm recording a video with a memory card inserted, why does the video recording end automatically after 30 minutes?

This is caused by using a FAT format memory card, which limits the maximum size of a single file to 4 GB. When a video file reaches this size limit, the camera will automatically stop recording. The camera's default video resolution is 1080p, which means a 30-minute video is around 4 GB.

It is recommended that you use internal storage to record large videos.