Microsoft solution to automate backup on SQL Express

(SQL Server Agent is not available on this SQL release)

Microsoft Solution

https://support.microsoft.com/en-us/kb/2019698

Sample Backup.cmd file

sqlcmd -U sa -P xxxx -S .\SQL2012EXPRESS -Q "EXEC sp_BackupDatabases @backupLocation = 'C:\SQLBackups\', @backupType = 'F'"

You can schedule jobs with standard "Windows Jobs"