Did you managed to connect USB storage or mouse thru USB port in i8160? I did not found anyone who managed to do that. If yes, then it is awesome.
I have OTG cable and my i8160 is not responsing after connecting mouse, keyboard or pendrive. Even with "USB OTG Helper" app. Tried to power connected devices via USB HUB, but it did not helped.
The reason why it is not working ... its because i8160 do not give any power required to power connected devices. Ace 2 cannot work in host mode for USB. Tried this already in GB and JB (MB2 and MB4). Hafidzduddin confirmed that in kernel there is everything that is needed for USB OTG, but probably it is lack of something in hardware.
But all bluetooth mouses and keyboards work good.