I want to backup my server sometimes to an external device. I want to keep it incremental because I want to save backup memory. I tried to do btrfs send /var/lib/lxd/snapshots/container/snap | btrfs receive on /mnt/backup,
but it saves the .yaml files there only.
Is there a good way to do this? I don’t want to add another storage pool and copy it in the lxc way with a backup container, because I plug in the external device sometimes only.
Thank you in advance!