How To Root Xiaomi Redmi Phones. Press & hold the power button + volume up key together for a few seconds. Copy that boot image file into your mobile internal storage or sd card.
Copy the supersu.zip & disablerforceencryption.zip files to the internal storage or sd card. The program will then find your device and prepare a way to root your phone. Once the flashing process completes, tap on reboot system, your xiaomi redmi 8a device.