The storage account audit history allows you to see a full list of all changes that have been made to the storage account. Anything that has be edited, deleted, or added (including payments) will appear. The history also shows a time stamp of when the change was made and the user that implemented the change.
Viewing audit history
Navigate to Storage -> Accounts (or click here to go directly to the page), and select an account.
Click the View Audit History icon.