Rooting Android Samsung G7102 grand 2 duos

I want to recover lost pics from my phone samsung g7102 grand 2 duos and the recovery software requires that the phone be rooted.

I tried: 1. Using towelroot, didn't work. Device not supported. 2. Using kingo root, didn't work. Connected with software for hours but nothing happened.

How can I easily root my phone? Has been a day since I am trying. Thanks