diff --git a/Guide-ObjectStorage.md b/Guide-ObjectStorage.md
index 274bd9d..cb3c295 100644
--- a/Guide-ObjectStorage.md
+++ b/Guide-ObjectStorage.md
@@ -1,2 +1,19 @@
-# WIP
+# Overview
 
+
+## Diagram
+
+```mermaid
+flowchart TD
+    A[User / Application] --> B[ObjectBucketClaim OBC]
+    B --> C[ObjectBucket provisioned by ODF]
+    C --> D[Secret with endpoint and credentials]
+    D --> E[Application Pods using bucket]
+
+    %% Styling for clarity
+    style A fill:#f9f,stroke:#333,stroke-width:1px
+    style B fill:#bbf,stroke:#333,stroke-width:1px
+    style C fill:#bfb,stroke:#333,stroke-width:1px
+    style D fill:#ffb,stroke:#333,stroke-width:1px
+    style E fill:#fcf,stroke:#333,stroke-width:1px
+```