I've tried several times to root my G900V, and it has never worked. My phone is too new for towelroot to work, and besides that, all options besides the (fairly) standard method of Odin and SuperSU don't seem completely trustworthy. However, the Odin/SuperSU thing hasn't been working for me. I followed this youtube tutorial exactly (besides using a newer version of Odin), and this is what I see when I try to flash the openrecovery file to my s5:
Any help as to what's wrong and how to fix it is appreciated. Also, if there are any better guides or methods, please tell me.