docs(add): storage class specs

Author: nerda-codes

pages/audit-trail/concepts.mdx

@@ -20,7 +20,7 @@ An event is a record of any activity related to your Scaleway resources, encompa
 
 ## Export
 
-Audit Trail exports allow you to upload your [event](#event) logs from the past 90 days to any [Object Storage](/object-storage/) bucket.
+Audit Trail exports allow you to upload your [event](#event) logs from the past 90 days to any [Object Storage](/object-storage/) bucket. By default, your event logs are exported to the `Standard` [storage class](/object-storage/concepts/#storage-class) or to the storage class you have selected upon bucket creation.
 
 This feature leverages Object Storage benefits which include:
 

pages/audit-trail/how-to/manage-adt-export.mdx

@@ -11,6 +11,8 @@ import Requirements from '@macros/iam/requirements.mdx'
 
 This page shows you how to export your Audit Trail event logs to an Object Storage bucket, and retrieve an export using the [Scaleway console](https://console.scaleway.com/).
 
+By default, your event logs are exported to the `Standard` [storage class](/object-storage/concepts/#storage-class) or to the storage class you have selected upon bucket creation.
+
 <Requirements />
 
 - A Scaleway account logged into the [console](https://console.scaleway.com)