LG Backup Service LG G3 Confusion

[AC Question]

I backed up my contacts using the LG Backup Service, and then went into my phone and dragged the file from the "LG Backup" folder that it created onto my desktop. I performed the factory reset, and then dragged the file back into the folder "LG Backup". When I go to retrieve my contacts via the "LG Backup Service" it sees the file, but fails when I try to restore it. Any solutions?