Question Author
Hi Emmie
Bought it from Co-Operative Electricals, they were the cheapest and the best delivery service. Used them quite a few times and they have always been good. However, I digress. Think I've sussed out what's wrong. Just realised that the USB Hd has to have a minimum of 32 Gb memory - my dongle is only 8Gb and there wasn't enough space on my external HD to reach 32 Gb. Just waiting for Sony to confirm. Once again many thanks to all who have answered my question - Happy Christmas to all !
FBG40