Cannot backup 'My Document' folder on remote computers through SSR 2013 Management Solution

Hi,

I installed Symantec System Recovery 2013 Management Solution on Windows Server 2008 R2.

After that, I installed agent and plugin on remote computers. I plan to backup only My Document folder from remote computers.

In backup policy I only found to backup complete C: drive. There is no granular options where I can check to backup some folder or file.

Can someone give me some information about this issue?

Thanks