TWRP 3.0.2/latest version (even twrp 3.0.0 would do).So I am making this guide so that others wont lose their precious files. Cuz, many people (even I before) dont know that formatting /data to f2fs would wipe the internal storage too, and at later would end up crying after losing their precious internal storage files (its very difficult to recover the lost files after formatting to f2fs).
