It was rooted with Towelroot
I have Titanium Backup Pro, SuperSU and ESFileExplorer installed.
I have been trying to install TWRP using Odin. I tried installing both 18.104.22.168 and 22.214.171.124 d2vzw.tar but both failed.
I went looking in the Play Store for GooManager but it is not there.
Is there another relatively easy way to install TWRP or make a system backup to an external SDcard through USB.
Any help would be appreciated.