I went through a similar dance with my sandisk card, reformatting, testing, it failing, me thinking it was something other than the card itself…and its not that the card is bad, its just that it was not built for this purpose… i would have the card work for a while, but when i would go into playback to view the footage the problems would start. I would suggest getting either the Wyze branded card, or the Samsung Endurance card before you spend too much time testing everything else and driving yourself crazy. Here is the thread i found that convinced me to get a different card:
Here is the card I have been using with no issues:
https://smile.amazon.com/Samsung-Endurance-128GB-Micro-Adapter/dp/B07B984HJ5/ref=sr_1_1?crid=RD3U626GTOQ0&keywords=samsung+pro+endurance&qid=1569685231&s=electronics&sprefix=samsung+pro+en%2Camazon-devices%2C203&sr=1-1
Wyze does not officially support any card over 32GB - however i have had no issues with the 128…so far 