diff --git a/_Sidebar.md b/_Sidebar.md
index e8124e4..ab34f4d 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -17,6 +17,7 @@
   * [[Directories and Files]]
     * [[Filer Cassandra Setup]]
     * [[Filer Stores]]
+  * [[Data Structure for Large File]]
   * [[Filer Data Encryption]]
   * [[Filer Commands and Operations]]
   * [[Migrate to Filer Store]]