On hindsight you are right but I was working a bit blind there. All working good now. One serious problem I have is my backup USB HDD a Western Digital 2 TB is not recognised by Windows. The other two USB drives are recognised using the same cable and same USB port. I carried out an extended test - 10 hours- on the suspect drive using Western Digital's Dashboard app but no fault was found and the drive is still not recognised, but is visible in Admin Tools. Pain.