Next select AUTO, CHECK CRC32, DECRYPT AUTOMATICALLY and BINARY NATURE
Then press Button CHECK UPDATE
Software should show you latest firmware that Samsung give your phone.
To download firmware press button DOWNLOAD and select where firmware should be downloaded.
Wait until download end, now unpack firmware by 7zip or any other packer.
Changing firmware in the phone will erase all of your data !!
All described operations you are doing at your own risk !!
If want saves your data do a backup before starting!! !!
If want update phone to Android Oreo firmware must use Odin3 v3.13.1 version or higher.
Samsung Firmware Change/Update by Odin
Before start check, if the phone has battery charged at least 30%.
Connect your device to the computer via USB cable.
After that, you should check that you have installed Samsung drivers. If not install from here Samsung Drivers
If you have installed you will see ID:COM field highlighted and also in log Added.
Make sure you have selected Auto Reboot and Factory Reset Time options.
Select Correct image like on the picture if you want to change firmware with data erase. Note! If you got only one file upload it as AP file.
If you not want data erase but just to update android version to higher (region must be same like in phone if not phone will only reboot on logo and never turn on) , just use HOME file like CSC file (when is an archive that you downloaded or just download firmware from samfirm with unchecked option BINARY NATURE in this situation you will have firmware that has only 1 file)
Check everything again, and press START.
Your device is updating now, be patient it can take a while.
Your device has been updated. Now, you can disconnect the device from the computer.
Warning! After the start, you should not disconnect the device from your computer.