How do I fix corrupted SD? Using the official PiFi one. I was doing a lot of read/writes, it failed and won’t boot (sector failure or something) and even flashing the image with raspberry pi imager and image from downloads it still won’t boot.
Try the .img linked on this post - should handle any corruption on partitions which sounds like may have happened on your install. Shouldn’t be necessary for a new SD unless complete card failure.