Use it with an external power source, the output power is not enough to spin your hard drive rotor.
You’ll need an OTG hub with additional power source like this one http://es.aliexpress.com/item/Universal-usb-OTG-Charger-HUB-cable-for-Tablet-PC-thinkpad-8-X98-M80ta-WT-8-Miix2/2038609573.html?spm=2114.10010408.1000022.1.u4Gaqj&isOrigTitle=true&isOrig=true#extend
** It doesn’t charge the Plus tablet while using OTG, it’s a Plus issue, with the Pro works perfectly.