Norton 360 Backup full

My harddrive on my computer was recently replaced. I used the Norton backup to restore my files. Now, when it tries to backup my files it states that my backup is full. I have 7 MB available for backup according to the program... Don't see how it is full when I only have a 5 MB harddrive.

 

I think when it began backing up my files from the "new" harddrive it duplicated all my files. I want to backup my new files but don't know how. Any help would be appreciated.

 

Thanks.