Anker – a convenient desktop device for connection of two drives, or other devices with interface USB 3.0. Price on amazon is $ 12.
Read another very interesting article about alternative energy of the Sun, water and air.
Dual USB 3.0 – Hub Anker
Look a video from russian roads:
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There are lots of similiar brands out there like RAVPower, Hootoo, etc and they generate similiar products, it is really hard to make a decision.