Ghost 15.0 file and folder backup

I am new to the community so I apologise if my question has been posted before.

 

I use an external drive to backup to using Ghost 15.0. I also use this drive to save a copy of my photographs, documents etc.

 

When Ghost is backing up it also backs up whatever is on the external drive. I don't want it to do this as I would like it to backup just my main drive. I have looked at the settings and the help files on the Symantec website but cannot find any instructions/help for doing this.

 

Can anyone help me with this.

 

Thanks in advance.