I went down that rabbit hole a few years ago. Many cards don't tolerate sudden power loss while writes are happening. The solution I found was these ATP micro

I went down that rabbit hole a few years ago. Many cards don't tolerate sudden power loss while writes are happening. The solution I found was these ATP micro SD cards (looks like the prices have increased like 3x though...) where the firmware is specifically designed to tolerate abuse: https://www.digikey.com/en/product-highlight/a/atp/industrial-grade-sd-sdhc-cards https://www.digikey.com/en/product-highlight/a/atp/industria... Perhaps there are other cheaper but still robust alternatives now?