Splitting earlier than the times below?
Files that split before the durations below occur to avoid corruption. These times below are baselines but are not required to be hit for it to split.
If you record to your microSD card and notice that your single event recording is split into multiple files, this is due to the camera's automatic mechanism that restarts the recording after a set amount of time to help prevent file corruption.
If your microSD card is formatted in FAT32, then recordings may be split more frequently. We recommend formatting your card into exFAT. Files may also split for various other reasons to protect file integrity and to avoid data loss.