diff --git a/frontend/public/json/openarchiver.json b/frontend/public/json/openarchiver.json
index 268d36da6..e1d96d91d 100644
--- a/frontend/public/json/openarchiver.json
+++ b/frontend/public/json/openarchiver.json
@@ -31,5 +31,10 @@
     "username": null,
     "password": null
   },
-  "notes": []
+  "notes": [
+    {
+      "text": "Data directory is: `/opt/openarchiver-data`. If you have a lot of email, you might consider mounting external storage to this directory.",
+      "type": "info"
+    }
+  ]
 }