Use the Delock 3.0 cable as an extension of my O2 Huawei surfstick. The cable is super processed and transfers even with surfsticks the full transfer rate without interruptions. Cable is firmly seated at both ends in the slot. The cable has been tested on a "Seagate FreeAgent GoFlex 2TB USB3.0" and operates at maximum speed. Absolute buy recommendation of the article ... but the delivery time from the vendor with nearly 2weeks was a little long.