Fix index

mkdocs.yml

 site_name: "storage"
 
 nav:
-  - Data Storage Services: ./index.md
-  - Object Storage Services: ./object-storage/index.md
-  - General Storage Guides: ./object-storage.md
+  - Data Storage Services: index.md
+  - Object Storage Services: 
+    - object-storage/index.md
+  - General Storage Guides:  object-storage.md

object-storage/index.md

@@ -15,7 +15,7 @@ Object Storage Services is a portfolio of services allowing to facilitate your a
 
     **S3** is a general service suitable for most of the usecases (archives, backups, special applications...). It also allows to share your data with other users or publicly via link.
 
-    [:octicons-arrow-right-24: Overview of S3 Service](./os-index.md)   
+    [:octicons-arrow-right-24: Overview of S3 Service](./index.md)   
     [:octicons-arrow-right-24: Bucket Sharing](./rclone.md)   
     [:octicons-arrow-right-24: Bucket Encryption](./rclone.md)   
     [:octicons-arrow-right-24: Worm model](./rclone.md)