Update
I returned the drive to the store I bought it from and now have a replacement that so far works for two days.
Since changing the drive [which worked straight out of the box on my laptop] the USB socket that I plugged it into on my main computer works erratically for some devices ~ Coincidence ? ~ Cause?
The only downside of all this is the hours taken travelling to and from the store and wasted data, in total has been 7 hours + travel I estimate it at € 450 + loss of data.
Sign of our modern technological times ?
I do praise WD support however as they at least took the time to contact m ref the problem.
Onwards and Upwards