A USB 3.0 won't be superseded any time soon and it's ten times faster than USB 2.0.The USB 3.0 specification was published in 2008 but USB 3.0 devices didn't become mainstream until 2012, four years later. Given that USB 4.0 has not even been announced yet, if you buy a USB 3.0 device it wont be superseded anytime soon. The primary benefit of USB 3.0 over USB 2.0 is speed which has increased by approximately a factor of ten.