I am trying to backup a large folder (photos) from my PC hard drive to an external hard drive but I keep getting a message "There is a backup problem. Make sure the destination drive or device is connected and then try again." I have done this and tried many alternative settings eg including files. folders, different file types etc. I have followed the advise creating a new backup set but it still doesn't work.
Backup seems to work when the destination is Norton Cloud storage but not to my local external hard drive. I can copy to and read from this hard drive using Explorer.
Any advice appreciated. I am using Norton 360, latest version, on Windows 10
[Edit: Clarified Subject]