Download the latest odin from a reputable or good site.. like XDA-developers.. I think that one I've used is 3.11.1
there are two files
I've used the CSC_TMB_G935TTMB4APK1_CL9507190_QB11413830_REV02_user_low_ship_MULTI_CERT.tar.md5 file instead of HOME_CSC_TMB_G935TTMB4APK1_CL9507190_QB11413830_REV02_user_low_ship_MULTI_CERT.tar
This will completely wipe the phone.. The MAIN Important thing is not to click on any check box or any settings on ODIN.. else you can easily brick the phone.