If I may ask , which model do you have and do you have front and rear cams?
Nextbase DVR522GW
It uses blue-tooth to communicate with both my truck and my phone, has GPS...even shows a map of recorded sequences and you progressing along the map as it simultaneously shows the actual video. Holds several hours of sequences before recording over previously-used data space...not sure how many exactly...more than I could count (and I read manuals like we all do).
No rear cam, but that's because I'm cheap, and you can tell if you get rear-ended from a dash cam 99% of the time.
I got turned on to dash cams initially by watching videos by MegaDrivingSchool and other content providers on youtube. Watching those videos has certainly made me a more defensive driver, and it reinforces what to look out for...sort of like staying on guard when you are carrying.
Another thing I forgot to mention, if you get one, get the best camera optics you can afford. Many are not clear enough to read a license plate from 20'....makes the camera worthless IMO. This cam isn't bad...think it's $200, maybe $250.