diff --git a/Makefile b/Makefile
index a47f627..2c60098 100644
--- a/Makefile
+++ b/Makefile
@@ -41,6 +41,12 @@ lint:
 backup: deps
 	ansible-playbook playbooks/backup-docker-volumes.yml
 
+backup-snunmu: deps
+	ansible-playbook playbooks/backup-docker-volumes.yml --limit snunmu
+
+backup-qnap: deps
+	ansible-playbook playbooks/backup-docker-volumes.yml --limit qnap
+
 restore: deps
 	ansible-playbook playbooks/restore-docker-volumes.yml -e volume_name="$(volume_name)"  --limit "$(host)"
 
diff --git a/playbooks/backup-docker-volumes.yml b/playbooks/backup-docker-volumes.yml
index 3a0752b..b6b2f8b 100644
--- a/playbooks/backup-docker-volumes.yml
+++ b/playbooks/backup-docker-volumes.yml
@@ -6,6 +6,7 @@
     # corrsponds to which category of backups will be used.
     # determined based on the docker labels.
     schedule: nightly
+    docker_backup_retain_count: 7
 
   pre_tasks:
     - name: Include vault variables.
@@ -30,6 +31,7 @@
         name: chatton.docker_backup.docker_s3_backup
       vars:
         container_backup: "{{ container_item | regex_replace('^\\/', '') }}"
+        docker_backup_retain_count: 7
       with_items: "{{ container_names }}"
       loop_control:
         loop_var: container_item