I have rooted my Samsung on7 (G600FY) to use this resource but it didn't work.
I could install the patch through TWRP but there were no options on Settings -> Storage -> Format SD as Internal. Only Portable Format was available. Then, after some searches I could do it with Root Essentials App, it did the trick but still all my apps were getting installed in the internal memory (even I did migration to SD), also it kept showing Full Storage messages like before (even tough there was more than 29gb free after the "merge").
Back to 0.
I highly recommend not doing it.