There is a possibility, to back up the entire HardDisk (Android + Windows)?
Booting from an external usb- dvd drive ( with clonzilla or acronis) did not work.
At the bios under booting options,i have not found the usb-dvd drive??
You can boot from a flash drive, but it needs to be formatted to support UEFI Secure Boot. I’ve had success with default Macrium Reflect Rescue Media, and ISO “burned” by Rufus.