#mnt_reform I wrote the .img to a SD card, booted from the SD card, ran reform-flash-rescue to install the image to the eMMC. Then I booted into the eMMC, ran apt update and apt upgrade, and now the SD card reader just won't read. I tried booting from the SD card, nothing. The Disk manager says the SD card contents are Unknown and no matter what card I put in, it's always the same. Did the SD card reader just break? Or did the firmware got updated and messed up? I'm so lost and I don't know what to do to boot from SD.