After my comment this morning I have just had a disaster and my EHD seems to have died. I have spent two days transferring every photo into one place, sorting by date, removing duplicates and putting them into lightroom... two days of my life I will never get back! Thankfully I didn't delete anything so I can do it all again but what a waste! I'm so aware that EHDs can fail so I had a new one here ready to back it up when I was done... so sad