USB 3.0 Issue - Mybook Essential

I’m running Windows 7 and  have a 2tb Mybook Essesnital bought to partner Novastor Backup Software.  It works fine with usb 2.0 but switching to usb 3.0 at various points during a backup it simply freezes.  I can still operate the software so I think it maybe a driver/firmware issue.  Any suggestions?