help with Samsung galaxy E7 SM-E700H root

sorry to bother you but i need help because i followed this guide : blog.flexispy.com/root-samsung-galaxy-e7-sm-e700h
to root my Galaxy E7 SM-E700H but for some reason SuperSU keeps saying the SU binary needs to be updated and when i continue it says installation failed please reboot and try again and i kept trying to reboot and even tried to root it again but it just won't root and root checker says the root is not properly installed!!! i need help please :( :( :( :(:(

SM-E700H OTG can support

Hi , everyone!.Nice to meet u all.I wanna know that my Galaxy e7 SM-E700H can get OTG suport?Cause I saw in a site , some of the phone are hardware support but there has no drivers and ROM aren't support for this.So, I wanna know my phone can support OTG as from hardware support or not!?.Please! Thanks for your time!