With the Enterprise edition and an Advanced Data Source, you can add an attachment to a session and the file will be stored directly in the database. Please note that the file will not be available in Offline Mode.
Information - Attachments
Attachments can be of any types and of any sizes, depending on your bandwidth and database. You can also view a saved attachment from: the session context menu, the session properties or directly on the dashboard.
The update button will allow you to update directly your selected document instead of deleting it. Use it to save your local modifications after an edit.