When you delete a file, it moves to the Trash folder. The file is not completely deleted until the system automatically empties the Trash folder (this is done daily) or you manually empty the trash.
To delete a file from any location within the Vault:
The Vault appears in a separate window, defaulting to the Inbox.
Note: To select all files and delete them, click the Select all option at the top of the file list and click Delete.