how does OTG enabler app work? There is a device has no USB OTG signal, but the cheker says: "your device OS has USB OTG API, check for USB OTG kernel or driver signal"
OS v.6.0.1 M, i cant find OTG enabler support it.
I want to learn how does OTG enabler work? and What are the files that deal with it?
It will not work unless your mobile supports it.
OTG requires a source of power that need for it to work. Some mobile devices fails to provide enough power for OTG to power up the USB drives etc.
I personally tried in dozens of my mobiles and tablets. Nothing worked! 

not sure about rooted devices