borg-backup.sh VS snap-sync

It's easy to to setup. I suggest you look at some examples like this: https://github.com/Freaky/borg-backup.sh

borg-backup.sh, which runs my remote borg backups off a cronjob: https://github.com/Freaky/borg-backup.sh

zfsnapr, a ZFS recursive snapshot mounter - I run borg-backup.sh using this to make consistent backups: https://github.com/Freaky/zfsnapr

mkjail, an automatic minimal FreeBSD chroot environment builder: https://github.com/Freaky/mkjail

run-one, a clone of the Ubuntu scripts of the same name, which provides a slightly friendlier alternative to running commands with flock/lockf: https://github.com/Freaky/run-one

- https://github.com/qubidt/snap-sync

You might be interested in snap-sync. It is a bash script which accomplishes btrfs backups using snapper under the hood. So no need to use btrbk (but you get all the same functionality).

I've been using snapper and snap-sync for automated snapshots and backups to an external drive. Recently, snap-sync is no longer maintained, and it may not be able to do some more things that I want to do, such as:

I was actively using snap-sync to back up my files to a local hard drive. Unfortunately, snap-sync will be retired soon.

I use snapper for snapshots and snap-sync for backing up said snapshots on an external drive.

Yeah, I use snapshots for backups using snap-sync, which is a convenience script around btrfs send. Personally I use it to back up onto an external HDD, but it can also do remote backups over SSH. I'm just not sure if remote backups are incremental or not.

On my laptop I make extensive use of openSUSE's snapper and the snap-sync script to sync to two external USB drives. Lastly, I wrote a script to clean/expire snapshots on the external volumes.

Snapshots aren't proper backups by themselves; they don't protect you from disk failure or the entire filesystem somehow being corrupted. It is possible to use them as backups; personally I use a command-line script called snap-sync to do this. This has the advantage of retaining the incremental nature of snapshots (though the incrementality will be on your backup media, so the first snapshot of a 100GB filesystem you put on your backup drive will take up 100GB of space), plus it integrates nicely with Snapper which is the snapshot utility I use.