Backup File 
You can back up data as well as log entries on data carriers of the File type. Such files are also known as backup files.
Special Features with Log Backups
With log backups to a data carrier of the File type, the system backs up each log segment of the log area to a backup file.
The name of the backup files consists of a file name (specified when the backup template was defined) and a sequential number assigned by the database system (for example, logfile.001).
We recommend that you archive these backup files regularly.
See also:
Concepts of the Database System,
Backup Templates and Data Carriers
Database Manager CLI, 
Further Commands for
Backing Up
Database Management in CCMS, Archiving Backup
Files