Backup SQLExpress databases

SQL_batch.sql

declare @dbname varchar(50);
declare @sql varchar(max);
declare @path varchar(50);
set @path = 'F:\Backup.SQL\Backups\'
declare mycur cursor for select name  from sys.databases where database_id>4
open mycur
fetch next from mycur into @dbname;
while @@FETCH_STATUS =0 
begin
set @sql = 'backup database ['+@dbname+'] to disk='''+@path+format( getdate(), 'yyyyMMdd-hhmm')+'-'+@dbname+'.bak'';';
print @sql
exec(@sql);
fetch next from mycur into @dbname;
end
close mycur;
deallocate mycur;

CMD file

sqlcmd -E -S .\sqlexpress -i F:\Backup.SQL\Maintenance\SQL_batch.sql

forFiles /p "F:\Backup.SQL\Backups" /s /d -30 /c "cmd /c del @file"