iam getting only 11MB/s transfere rate, so it seems to be usb2, but iam not sure.
It has a slow transfer rate. A higher rate is really only useful when updating maps. None of the models use high speed rates.
USB 2 max rate is 480 MB/s.
USB 1.1 is 12 MB/s.
those are teroretical speeds.. usb 2 is much slower