diff --git a/docs/user_guide.md b/docs/user_guide.md
index f091cccf17..99256caaeb 100644
--- a/docs/user_guide.md
+++ b/docs/user_guide.md
@@ -163,10 +163,10 @@ Run the command on the host which harbor is deployed on.
 
 ```sh
 $ docker-compose stop
-$ docker run -it --name gc --rm -v /harbor_deploy_path/harbor/Deploy/config/registry/:/etc/registry/ -v /data/registry/:/storage/ registry:2.4.0 garbage-collect [--dry-run] /etc/registry/config.yml
+$ docker run -it --name gc --rm -v /harbor_deploy_path/harbor/Deploy/config/registry/:/etc/registry/ --volumes-from deploy_registry_1 registry:2.4.0 garbage-collect [--dry-run] /etc/registry/config.yml
 $ docker-compose start
 ```  
-Replace "/harbor_deploy_path" with path where your Harbor is deployed. And if your images are not storaged in "/data/registry", replace it too.  
+Replace "/harbor_deploy_path" with path where your Harbor is deployed.   
 Option "--dry-run" will print the progress without removing any data.
 
 About the details of GC, please see [GC](https://github.com/docker/distribution/blob/master/docs/garbage-collection.md).  
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