An expired file is a file that the server no longer needs to keep, according to policy. Files expire under the following conditions:
The server deletes expired files from the server database only during expiration processing. After expired files are deleted from the database, the server can reuse the space in the storage pools that was occupied by expired files. You should ensure that expiration processing runs periodically to allow the server to reuse space. See Reclaiming Space in Sequential Access Storage Pools and Running Expiration Processing to Delete Expired Files for more information.