Downgrade from Android 8.1.0 to 7.0 on Samsung Galaxy J5 2017

[Android Central Question]

I have a Samsung Galaxy J5 2017 SM-J530F and want to downgrade from Android 8.1.0 to 7.0.

I followed all the steps properly but everytime I press start on Odin it always says failed. Are there any solutions which will help me downgrade from 8.1.0 to 7.0?

 

[Rukbat]

Are you sure you're seeing a "COM<something>" in the box in Odin when you plug in the phone?

Are you sure you added the right file (or files) to the right slot (or slots) in Odin?

If yes to both, what version of Odin are you running?

 

[Sanay Patel]

When plugged in phone box turns blue
Yes all 4 files in correct place.
Odin 3.13.1