diff --git a/src/translation/en.json b/src/translation/en.json
index 6aa7fb8e3..34ddfb781 100644
--- a/src/translation/en.json
+++ b/src/translation/en.json
@@ -1102,7 +1102,9 @@
                 "volume": "Volume",
                 "noMounts": "No volumes are mounted.",
                 "addMountAction": "Add a volume mount",
-                "saveAction": "Save"
+                "saveAction": "Save",
+                "description": "Volumes are directories mounted onto the host system, which can be shared between apps. This may be network mounts like NFS or large storage disks directly attached to the server.",
+                "warning": "Volumes are <i>not</i> part of any backups. Restoring an app would thus not restore the volume's content. Please make sure to have some suitable of backup plan for that volume."
             }
         },
         "graphs": {
diff --git a/src/views/app.html b/src/views/app.html
index 11c3f9c26..421fb58d6 100644
--- a/src/views/app.html
+++ b/src/views/app.html
@@ -737,6 +737,8 @@
 
         <div class="form-group mounts">
           <label class="control-label">{{ 'app.storage.mounts.title' | tr }} <sup><a ng-href="https://docs.cloudron.io/apps/#volumes" class="help" target="_blank"><i class="fa fa-question-circle"></i></a></sup></label>
+          <p ng-bind-html="'app.storage.mounts.description' | tr"></p>
+          <p class="text-warning text-bold" ng-bind-html="'app.storage.mounts.warning' | tr"></p>
           <div class="has-error" ng-show="storage.error.mounts">{{ storage.error.mounts }}</div>
 
           <table class="table table-hover" style="margin-top: 10px;" ng-show="storage.mounts.length > 0">