BPS DB Backup uses your email settings on the S-Monitor page > Send Email Alerts & Log Files To, Send Email Alerts & Log Files From, etc. There is not an additional DB Backup option to use a different email address. BPS DB Backup is designed to be a lightweight point and click DB Backup feature. So probably what you want to do is install a WordPress backup plugin that specializes in DB and/or file backups since you are looking for additional storage locations like google drive.