I have bought this sandisk ultra dual 3.0 usb last month. They have told that it is a 3.0 usb drive but actually I am not getting that much speed. The average copying speed that I get is only 5-7mbps, which is as a 2.0 pendrives.
The functionality I liked in this pendrive is it has both usc connector and otg connector as inbulid. So its easy for us to connect to mobile devices for transfering data.
The design is not that much user-friendly. Its is not in a shape which we can hold well. The pendrive has got a knob to change the connection type between usb and otg.
I have tried to solve my problem with coping speed. But actually I didnot get an good and helping responce from their support team.