Has any ways to improve the performance of my Nexus 7 in reading data?

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.
 
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