PC back-up source is partitioned. How to to set back up from both?

My PC (back up source) is partitioned into C: and D; drive. I only see that I have one option either C: or D:. How can I configure the WD SmartWare Pro to auto back-up from both?

Setup the backup plan for the C partition and then setup a separate backup for the D partition. Once both plans are setup and enabled, the Smartware will monitor both partitions and run the backups according to how you set them up. For example, you can have a category backup of the C drive that runs hourly and a file backup of the D drive that runs daily. Or run both in continuous mode.

Here is a link to the SmartWare User Manual, if you do not have it.