Re: Should I upgrade.
It might be worth changing the USB being used. I have a Sandisk 16Gb thumb drive that Windows doesn't recognise as a drive even though it recognises it as a USB device ie Explorer doesn't automatically open which is the default action for such drives.
However Windows Explorer can view, transfer, delete etc the files on it, don't know why this is so because other drives by the same manufacturer bought both before and after this model are fine (I have three of this type).
Just a thought.