I am having problems with connecting USB3 external hard drives, They are both new Samsung drives ( 2.5" portable and 3.5" desktop) , when connected to any of the USB3 ports I start to copy data to them they stop half way though with the mesage " the drive needs to be formatted before use" which of course they were, so reformat the drives only for the message to come up again, This problem does not happen when the drives are plugged into the USB2 ports