Hi, folks!
We’ve been looking into microSD card issues for a while. Like DreadPirateRush said, it’s tricky to hunt down because some issues are from the cards themselves, some from camera hardware defects, and at one point we found a firmware issue we were able to fix. We’re still looking into this though. If you have trouble with your microSD card and it’s within our specs (32GB or less and formatted in FAT32) but formatting it with a computer doesn’t help, please contact our support team. Here’s a link in case you need it!
https://support.wyzecam.com/hc/en-us/requests/new
We’re sorry for the trouble and appreciate you letting us know.