mobile

Hello all. I am fairly inexperienced but was able to root my Galaxy S4 in a round about way with towelroot. I now want to sell the rooted S4. How do I go about getting all my info off of there and signed out of my google account without doing a factory reset? I have read that a factory reset on a rooted phone, if it works, unroots the device and I want to keep it rooted. Does anyone have experience with this? Your help is greatly appreciated. Thanks