A5 2017 is absolutely OTG supportale but you have to buy a USB Type-C OTG connector. You can't use the macro USB converter as a OTG connector which is supplied with the phone box.
yes, the " Galaxy A5 (2017) OTG connector " doesn't work if u want the " OTG connector " don't buy an " OTG connector " buy " Huawie OTG connector " Because " Galaxy A5 (2017) OTG connector " doesn't work and i don't know why. i hope u have benefited.
