marras

@jock at the end I was impatient and I cleared the emmc and tried to restore the backup... Everything went well, Android has been restored successfully! I think I was lucky because the backup is 2.5gb, under the fat32 limit, but after decompression it is as big as the all emmc (16gb). The problem is that I cannot extract anything from it, since the decompressed file is not an archive according 7zip, it's just a file without any extension. After cleared the emmc again, Linux from sd booted successfully and also after flashing in the emmc. wifi, hdmi works (only audio doesn't but I don't need that). I'm a bit disappointed by the performance, xfce doesn't run that fast, but it's ok since I need just to install klipper for my 3d printer and I hope it's enough for this purpose. Thank you for all the support, you have been precious!

So basically you are saying I cannot boot Armbian directly from sdcard without erasing the internal flash, such as multiboot does? In the guide in the first page you say that is a good idea to try to boot linux from sd first, for this reason I thought it would be possible at least to try before messing with the emmc edit: reading carefully the guide, you suggest to wipe the flash first, than try to boot from sd card with armbian flashed onto it, and then if everything works try to flash in the internal memory, right? Anyway, the 2 backups seems the same, how can I extract the files and dtb from them? I tryed 7zip but it doesn't not recognise the file inside img.gz as an archive so I don't know how to extract