There are three ways Samsung Galaxy update:
If you want to update your phone using recovery – download official update, reboot your phone into recovery mode and click “Install update from SDcard”.
To update Samsung Galaxy with Smart Switch – install app from official site, connect your phone and click “Update”, Smart Switch will automaticaly download and install the latest official firmware.
Everything with “how to install CWM Recovery with Odin” is almost the same as in the firmware of the smartphone. The main thing here is that you do not need root rights to understand how to install TWRP Recovery using Odin: