I bought a TAPI or TAP1 S905X 1G. I've booted to android and I'm trying to extract its DTB, but is impossible because I don't have the /dev/dtb folder. Is this normal?
Try this script I made to backup these partitions. Go to recovery and select install from ext. Then select this zip. The image files will then be saved on the SD card. I have not tested with USB.