I had this question after viewing Cloning a Hard Drive with Casper
I made a bootable backup image of a Windows 10 computer with UEFI technology using Casper
and an external USB hard drive as the destination.
I tested the backup by changing the boot order to put the external drive first. Unfortunately, the Windows logo appeared but that is where the boot process got stuck. Any tips on booting from an external drive? UEFI seems to complicate things. Thanks.