Why does the Brave 8 shooting a video generate multiple files?

The capacity of all videos in the action camera should be less than 4GB after the SD card formatting to FAT32. You have to format the SD card before using.
1)if the loop recording function is not turned on, the videos recorded with the resolution of 4K or 2.7K, 1080P, and 720P will be saved every 9 minutes, 25 minutes and 37 minutes respectively till the SD card is full.
2) If the loop recoding function turns on, you can do it with the resolution of 1080P or 720P and 10 minutes is one video. New videos will also cover the existed ones when the SD card is full.