Yes mate.The newer unit, has a single USB 3.0 cable, not the usual Y cable, supplied with the first unit.I noticed the second unit has an extra barrel connector, for accepting 5 Volts.
I connected it to 5 volts to a USB port, and the main 3.0 cable to the other USB port (serial comms port).It didn't improve the situation at all!! Maybe, putting the barrel connector input , to a 'beefer' seperate 'dedicated' power supply may improve it.
I've got a USB 3.0 HDD, and I have no issues with it, it works fine!!
I take it, that the last unit, should only have one speed, and not go slowly from time to time - right??
Can you tell me, what is reason, why some drives , put the files into a 'Files to be Written to Disc' folder', and others don't.Does this indicate the Disc is blank?? On other drives I've used, it writes straight aftre a Copy/Paste, or Drag & Drop.There is a rare possibility, that both drives are faulty, but I extremly doubt it.
On the first unit, I put the Power side of the ';Y' cable to a dedicated USB power Supply, and it did Stuff All!!Thanks for your Help, Tah Simon.