Main reason is i don't use Timelapse as i prefer speeding up video. 4k 25 fps max bitrate of go-pro is 100mbit/sec. what means roughly 1 GB per min of video.

If i speed up a video 80 times it becomes 80gb/min :D final render in H265 is roughly 100mb per min. This video was roughly 6gb final size for 55minutes