mobile

hi there! i'm new in this site and i have a galaxy grand prime, i like it a lot but i want to install my apps on the external sd card but browsing some webs i have found that the root sets the knox on 1 and broke the warranty and i want to keep my warranty heheh, my question here is if is somwhere a method to root my phone without moving de knox?

sorry about my s**ty english :P thanks!