Backup EFS folder

[Dolby]

So I'm told I should do this before playing with firmware ... What is the easiest way to do this?

I have an S3 running 4.2.2 Cyanogyn mod and want to go the Sammobile 4.3 official

 

[Maverick Jester]

Ah, another crappy implementation from Samsung that I do not miss...

This should help.

 

[DarkmatterZA]

Back that **** up, easiest way to prevent paperweight bricking

 

[Dolby]

I'd never heard of it till earlier :/

Thanks guys