UPDATE - SOLVED!!
I went into my BIOS and changed the USB ports to be only 2.0. Calibre then functioned perfectly.
This puts the issue most definitely as a USB 3 vs 2.
So for anyone else with the problem - you can fix this by buying yourself a USB 2.0 hub (as per PeterT's suggestion on the next page). The one I'm using is from Targus, and it works perfectly.
Last edited by kiwik; 02-05-2017 at 08:04 PM.
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