Storing Completed Archive Files in the Archive System Manually (CA-ARC) 

Only archive files whose data objects have been deleted in the database can be stored in an external archive system.

If you want to store all the files in a session, set the cursor on the session number.
The Archive Management: Store via ArchiveLink popup appears.
The file is passed to the external archive system.
See also:
Determining Whether an Archive File is Stored in the External Archive (CA-ARC)