Add info on delete data and purge cache options

Author: RebeccaTamachiro

src/content/docs/smart-shield/configuration/cache-reserve/index.mdx

@@ -21,4 +21,18 @@ Smart Shield Advanced includes 2 TB of storage for Cache Reserve.
 
 ## Limits
 
-<Render file="cache-reserve-limits" product="cache" />
+<Render file="cache-reserve-limits" product="cache" />
+
+## Delete data
+
+You can remove all data stored in Cache Reserve. In most cases, deletion takes around 24 hours to be completed.
+
+1. Select the three dots next to Cache Reserve in your Smart Shield configurations.
+2. Choose **View details** to open the Cache Reserve sidebar.
+3. Make sure to pause Cache Reserve.
+4. Select **Delete data** and then **Save**.
+5. Select **Delete** again in the dialog to confirm.
+
+:::note
+If you want to purge your cache instead, refer to [cache configurations](/cache/how-to/purge-cache/).
+:::