Question: how to set a downloaded song as ringtone in moto g5 plus?
Answer: Create a file named RINGTONES in you stoagre junk either the on board storage or the SD card,
Then copy all your desired ringtones into that folder.
Go to the settings app.
Go to sound.
Go to phone ringtone.
Choose sim(if you have dual sim only)
Then find your favorite ringtone and set it as default !