Cameras had been working fine. Just last week started to miss event recordings. Able to measure misses because light timers are working.
Hello @rnacker, by any chance when this started happening was the storage space on the microSD card starting to get low?
I had a similar occurance starting about the same time on two of my devices: the Wyze camera started saying I had no SD card, even though I did and it had been working with that card for many months previously. Of course, the internal reformat is not available then. But usually, removing the card and doing a full (not Quick) format of the card on my PC would correct the problem, but I even have one SD card that is not recognized by one of my Wyze cameras, but works perfectly well in the SD slot of my PC. I suspect there is some activity (making room for more videos when full?) that is not working properly and cobbles up the SD card to make it unworkable.