Hi again, if you are having problem to copy files manually or using a backup software, I recommend you to use another USB cable and if possible connect the hard drive on another PC. You can also try running a DLG test to verify if the hard drive has any hardware damage.
The point which seems to be being missed is that when I log into the PC with my old but still existing user name and account the MY book works fine when I open it up. It is only when I log into the PC with my new user name and account and then try and open the MY book that the message on the My Book main screen says “there is no writable partition available!”!
I copied all my old user files over to the new successfully.