how to change default backup method

Hi, I'm a Pro user for about 5 yrs. I just got a new Pixel and want to move my favorites from my Galaxy Note 4 to the player on the new phone. I went into 'backup and restore' in the app and tried setting the backup to Bluetooth and having it backup to the old phone. It failed. Now, because some default related to the app was changed, I don't know where/how to change the default backup method. I imagine it's somewhere in the android settings somewhere, but I can't find it. Any help?