Thank you Snoopy. I downloaded FileZilla but I cannot get it to recognize the SD1 disk either. (The same result as with Acronis).
Today I tried Drive Image and this programme showed the SD1 disk as Unallocated and seemed to copy it to the other external backup hard disk ok and when finished,it showed the same as the original SD1 disk (Unallocated)but when I tried the cloned disk into the SD1 keyboard,it wouldn't recognise it.Message in keyboard said disk not formatted.
I tried to format it in the keyboard but it would only go to 11% and showed error message.(the disk I am trying to use as a backup is working 100%)