I use 32GB MicroSD cards in my car cams and have a few like this. They are toast and do what you wrote above.
Fix? Popped in a new MicroSD card and the devices work again.
Ok, so I've had this problem for a while and it's always bugged me. My problem is that my 64g Sandisk MicroSd will not be recognized by anything. If I put it in my phone it says "Preparing SD card", but then 2 seconds later a notification pops up saying that I should unmount it before taking it out, as if i did. But I didn't. When I put it in my Switch it says that I need to format it, but when I try to it says it can't. I don't know what to do, and I need help badly.