[Zubersoft]

If you want to backup your library under Settings->Backup and Restore->Backup Library and share the .msb file with mike@zubersoft.com, I can attempt to synchronize your library to OneDrive. It will probably succeed, as I've synchronized libraries as large as 10 GB to OneDrive without a problem, but we can see if there is something unique about your library. 

Thanks,
Mike