Norton security suite backup question first time user

Hello:


I am using norton security suite backup for the frist time. I got it through my internet provider Comcast.  It seems like it will not let me select a file type to backup within a certain group of folder(s). So either I can select file types OR I can select a folder (or folders) to back up. But if I have a folder with .doc, .xls, .jpg in it I cannot select that particluar folder and then select only the .doc files.  Does anyone have any ideas?

 

Thanks.