Guess I am going to need a USB 3.1 port to get the maximum speed from this USB WIFI device. For the time being whilst I only have USB 3.0 and soon an up to 250mbit/s fibre service I should be able to get downloads of 24 Megabytes a second from the Internet as I can transfer data from my USB 3.0 ext HDD to my internal HDD over USB at something like 75 Megabytes a second.
Not quite enough for gigabit internet which needs transfer rates of around 99 Megabytes a second but enough for now. Also not sure if my Router would be capable of sustaining 99 Megabytes a second over WIFI as its only a cheap one.