All set. After several computer restarts, I was able to backup without a problem.
Can anyone help? I'm at a loss. I've tried unsuccessfully to backup and receive this message. Error Code: BuEng_2810 Redirector Server unavailable (or inaccessible due to firewall). Check your Internet connection and/or your Internet security settings Many thanks. 
Dell DataSafe Online Backup Error Code BuEng_2810