A site backup includes the site schema and the site data dictionary. Included in the site backup file is a manifest document describing the contents of the backup and all necessary information to restore the site. Also included in the backup file is a dump file containing all database user objects belonging to the site schema and site data dictionary.
Backup zip files for a site use the following naming convention:
site name_s.zip
If a file exists in the backup location with the same name, the backup zip file name will contain a revision number: Site Server name_1_s.zip. There is no limit to the revision numbers.