For me i keep a local one so if I lose a file or something gets corrupted I can restore locally without any egress costs or network lag. The sync to remote is in case of local data loss for example fire or theft.

Rclone will (should) be faster than doing a restic sync due to not having to do any deduping etc.

B2 is Backblaze’a version of S3. It’s a cloud storage solution. https://www.backblaze.com/cloud-storage/pricing

Restic will encrypt the backup https://restic.readthedocs.io/en/latest/070_encryption.html

And it will backup directly to B2 so not intermediate storage is needed.

https://beets.io/ could do all of that for you.

Second restic or Borg with a rclone sync to storage. Restic will handle both for you though. Borg is an option if you want a local back up that then gets synced (or use restic to do multiple backups)

I use B2 storage and it’s dirt cheap compared to other offerings. You can use rclone to mount the bucket locally and only recover what you need to save on egress costs.

The advantage of restic/borg is not only encryption but snapshots, deduplication, and compression over a simple rsync.

Rsync.net can run a Borg server if you want to back up to that but B2 is much more cost effective.