If you're comfortable at the terminal you might give restic a shot
https://restic.net/
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Will do, thanks!
Can't zap you :(
nostr:npub1s277u5rww60te98w9umz6p7pjcxuus96cegdsf4y978qcqvu8jtq88dsym
If restic appears fit for your purpose, then maybe BTRFS isn't the right tool anyway?
Borg Backup (another feature rich and popular backup tool) could also be the right thing for you then.