I bought a viofo ticket and asked about this and that and found that the G sensor was not very useful in my car. My car is 2018 RAV4. If you have a car similar to RAV4, I think it'd be better to buy another cam.
One strange thing is that when I got the new firmware, the G sensor started working in parking mode. It's not perfect, but maybe there's a bug in the formal version.
If you're talking about G sensor whilst driving, and not parking mode, then I wohldn't bother. I've turned my sensor low/off, forget the option on that setting, then I just record my drive in realtime warts and all.
If I need to find anything it's in chronological order and all files in the same place.
I've never understood wanting separate files elsewhere on the card.
found it today when I was initializing the factory, but if I change the mode of the cam, there seems to be a bug where the G sensor doesn't work. If we proceed with the factory reset, it will be fine.