This is the steps
There will be 4 files after you extract the firmware
BL
AP
CP
CSC
Each of those files will go in Odin when you open to the corresponding slots
BL
AP
CP
Home slot don't put anything
CSC USE HOME CSC FIILE TO SAVE DATA /THIS ONLY GOING BETWEEN CARRIER FIRMWARE OR IF YOUR ON UNLOCKED GOING BETWEEN UNLOCKED FIRMWARE
If you going from carrier to unlock firmware keep regular CSC not home CSC and do a back up it will factory reset the device.
connect your phone with cable to computer , once the files are in its slots hit start, once done you'll see pass in Odin and it will reboot
*Make sure you put phone in download mode
*If dont see your phone connected in Odin change cables or ports in computer .
*Never disconnect the cable in middle of flashing.