1-Connect your device to your PC and copy UPDATE-SuperSU-v1.93.zip file to your device’s SD card.
2-Power down your device and put it into recovery mode.
( To do this, with the device turned off, press and hold the Power + Volume Up Home buttons until your device boots into recovery mode.)3-Select ‘install zip from sdcard.’
4-Navigate to the location of UPDATE-SuperSU-v1.93.zip and flash the zip file. Use the Volume Up and Down keys to navigate through and highlight the options and the Home button to select an option.
Once the flashing is done, reboot your device.
Download SuperSU Below :-
UPDATE-SuperSU-v1.93.Or you can try this method HERE