How to set up a full Windows OS Backup with Duplicati 2.3

No how-to just yet.

It works by clicking the “Add local disk” when picking the source:

(You need admin permissions to access the disk this way).

To restore, you need the target disk to be offline (i.e., boot into a live/recovery environment).

That is exactly what it is: full disk backup, including MBR, partition table, etc.

It is prominently mentioned as “Full Disk Backup”:

I think that is still the most prominent open-source solution, but IIRC, it requires that the disk is offline when you make a backup?