diff --git a/legacy/elementary/src/bin/test_store.c b/legacy/elementary/src/bin/test_store.c
index 9e785f677c..e5b5f6efe7 100644
--- a/legacy/elementary/src/bin/test_store.c
+++ b/legacy/elementary/src/bin/test_store.c
@@ -1,3 +1,10 @@
+/* NOTE : Before testing elm_store,
+          email data files should exist in your local storage.
+          And you can just get example files in enlightenment website.
+          Use wget to obtain it. It almost 50 Megabytes.
+          http://www.enlightenment.org/~raster/store.tar.gz
+ */
+
 #include <Elementary.h>
 
 #ifdef HAVE_CONFIG_H