Hello,
In case you wish to delete the Backup to disk folder, you can follow the steps mentioned in the technote given below:
Title:How to delete a backup-to-disk backup file from the Backup Exec GUI and recover hard disk space
http://support.veritas.com/docs/240876
In case you have further questions on the same issue, you can write back to the forum. However If we do not receive your intimation within two business days, this post would be assumed answered and archived.
Regards.