Not seeing one of my folders in backup

On one of the drives I’m trying to backup, there is a folder named “Temp” in the root directory. It’s not showing up in the selection panel of the smartware backup tab. The other folders of that drive show up. The folder is not hidden and I can access it in windows explorer. I’m trying to backup this drive in Files Mode to a 4TB WD My Book. Windows XP pro 32bit WD Smartware 2.0.1

Why would you want to back up a temp folder?  Besides, I thought smartware didn’t see system folders.

Firstly, it is not a system folder, or even on a system partition. Secondly, it shouldn’t matter what the folder is called. I want to back it up and should be able to so.