diff --git a/system/storage.php b/system/storage.php
new file mode 100644
index 0000000..12c35cb
--- /dev/null
+++ b/system/storage.php
@@ -0,0 +1,4 @@
+<?php
+function read_storage_file($filename, $offset=0, $length=0) {
+    // todo
+}