The memory card, no matter of class / brand / price will often be the weak link in a system, this is why dashcams are still not set and forget, and it is recommended to take a look at the memory card on the computer now and then.
It take me about 5 minutes to verify a 128 Gb memory card are good.
What i do is make sure some files can launch on my computer with the player i use there, and then i focus on first and last files in drive sessions and look for them not starting in strange places.
If you are anything like me you will notice you often drive the same routes to and from favorite places.
But if you have a driving session that start 1 mile from your house, then clearly have have been a issue, same if a session are interrupted in the middle with recording stopping while you drive along, and then start up recording again, thats things to look out for.
you dont have to play all files or view each file in its entirety, that would take as long as it took recording them, i just watch a few seconds of the files ( start/stop ) and then some i choose at random.
My front & rear system get inspected often as its from that one i mainly get footage for my uploads, some of the other cameras might be months in between.
Also i dont drive that much, maybe 2-3 hours every week in total.