I can‘t speak for btrfs, but with zfs you usually are advised to send the snapshots off to another location too. That usecase is highly supported.

Yep, fork of Element https://element.io/en/case-studies/tchap?ref=element.io

For future reference: if you are unsure about the app on the store, you can always go to the official website and get a link to the right app on the store that way. https://element.io/download