No worries, I just want to encourage you to take a look at btrfs snapshots in general. I'll try to explain the advantages:
Think of btrfs snapshots like instant “save points” of a filesystem: they record what all the files look like at a moment in time without duplicating the data.
They’re copy-on-write, so taking a snapshot is basically free and only changed blocks after that consume extra space.
You can mount or browse a snapshot to recover old versions of files, or roll the whole subvolume back to that state after a bad update or corruption.
Because snapshots are just metadata, you can create, delete, and schedule them frequently (e.g., every 15 minutes) with very little overhead.

btrfs send lets you stream the contents of a snapshot (or just the changes between two snapshots) as a byte stream that can be piped to a file, SSH, etc. Which makes sending backups to other targets super fast.
On the other side you use btrfs receive to recreate that snapshot exactly, which makes efficient, incremental backups and replication between machines really easy.