What are you trying to fix (bootloop, FRP lock, software update)? What error message are you seeing in Odin (if any)? I can help troubleshoot the flashing process.
Power off your phone. Press and hold Volume Down + Home + Power buttons simultaneously to enter Download Mode. samsung-j327a-u5-flash-file-firmware
Unzip the downloaded file to get files named with AP , BL , CP , CSC , etc. Open Odin: Extract the Odin ZIP file and run Odin3.exe . What are you trying to fix (bootloop, FRP