No, there isn't a way to combine multiple files of the same backup set into a single file.
No, there isn't a way either to split a backup set into files of equal sizes.
With regards to the naming convention, you use enter a base name and use the FILECOUNT option e.g.
- Code: Select all
EXEC..master..sqlbackup '-sql "BACKUP DATABASE AdventureWorks TO DISK = [g:\\backups\\AdventureWorks.sqb] WITH FILECOUNT = 5"'
will split the backup set across 5 files with the following names: