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Why not set up FreeFileSync to create a backup of what you want (You can have more than on set of choices) if all you want is 'on demand'.
FWIW I rarely change 'settings' (I do not use any 'lists' type PI), So when I do ( any major change) , I usually fire off a BU BEFORE I muck things up.
Real (longer term) Backups should NOT be kept on the same computer or drive (or even same SITE).
One of the main reasons is Drives fail. Computers die. Or the house burns down (I have a relative that lived in Altadena. They only managed to save their Dogs and cars. That was how little time they had. They were in the middle of town and never expected an issue like happened.)
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