Online Documentation for SQL Backup for SQL Server
At this page you can edit general options of Maintenance Cleanup step.
SQL Backup and Clouds criteria
Set the conditions for EMS SQL Backup backup files and files on clouds to be deleted. Use All files older than for time limiting or All files except for the latest criteria to specify the number of the latest backups to keep.
SQL Server criteria
Apply file age criteria on maintenance cleanup
Use this option to delete files above the age specified below.