diff --git a/nextcloud/backup.sh b/nextcloud/backup.sh
index 4a17b49..a6bd9c3 100755
--- a/nextcloud/backup.sh
+++ b/nextcloud/backup.sh
@@ -71,6 +71,7 @@ echo "# BACKUP: $DIR"
 
 # files...
 @ pct mount $ID
+# XXX should this be an incremental backup/sync??? (i.e. removing deleted files (to a dir))???
 @ rsync -Aavx /var/lib/lxc/$ID/rootfs/var/www/nextcloud-data .
 @ pct unmount $ID