These haven't failed for me: https://www.digikey.com/en/product-highlight/a/atp/advancedmlc-amlc-microsd-microsdhc-cards https://www.digikey.com/en/product-hig

These haven't failed for me: https://www.digikey.com/en/product-highlight/a/atp/advancedmlc-amlc-microsd-microsdhc-cards https://www.digikey.com/en/product-highlight/a/atp/advancedm... I'm cynically guessing it's down to a relatively simple workaround in the SD card firmware that fixes this very common corruption on power loss while writing. Or maybe that combined with a 0.1 cent capacitor.