First you will log into the mydata portal 

From the dashboard follow the steps below:

Multiple System:

1)Scroll down to Backup Summary

2)Click Manage next to the system you wish to add/remove file/folders. (Note: System must have status Connected)

3)Follow steps for Single System below moving forward. 

Single System:

1)Scroll down to the My File section.

2)You will navigate to the folder/file you want to backup

3)Select to add a folder/file to your backup or  to remove folder/file from the backup. (Note: The icon will appear to right of the Folder/File in the My File Section).

4)Once you finished selecting/removing the files/folders you wish to backup click Save in the Backup Selection Window.