grapenose on 24 July 2014
Get a Y adaptor cable and use both USB ports. It will draw enough power where you won't need a powered USB. I have a 500gb HD hooked up to my USB ports, works great.
http://www.amazon.com/gp/product/B002W8EDOM/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1