Totally I have gotten these devices for a period of time ： 1. Asus notebook ( win 7) 2. Sandisk SDHC UHS-I sd card (16G ） 3. Nexus 7 (2013) 4. ipad mini 5. ,Kingston Digital 16GB DataTraveler (64G ) , etc. I have added another ( multi-in one ) gadget recently like this : http://www.amazon.com/gp/product/B00GLKI258 I bought this mainly because of its ingenious design and suitable price. The most important point is that this small gadget can bring together different devices into a working team. It is amazing over my imagination. But I came across a practical issue in use. The transferred speed of data is a little out of my expectation. Maybe it indeed exceeds USB 2.0 much . But I am not so content with the current conditions. So I would like to know if there are any ways to optimize the speed (rate ) based on what I possessed now. Could I ..? Any kind suggestions are preferred.