The following article explains how to use an external drive directly with no software:
http://wdc.custhelp.com/app/answers/detail/a_id/1198/
The following articles explains how to use WD SmartWare to run automatic backups:
Per category:
http://wdc.custhelp.com/app/answers/detail/a_id/3828/
Specific files and folders:
http://wdc.custhelp.com/app/answers/detail/a_id/7069/
Regards,