kubernetes-configs/storage/HOW_TO_BACKUP.md

sudo rsync -avh /var/lib/rancher/k3s/storage/ /media/pi/backup-drive/k3s-storage/ or sudo rsync -avh --delete /var/lib/rancher/k3s/storage/ /mnt/backup/k3s-storage/

then install k3s curl on new device, copy the folder over, "kubectl apply -f this_root_dir" and done