Error syncing iTunes ringtone
Error syncing iTunes ringtone - YouTube
(Launch administrator privileges)
I used the iPhone in Korea
I was writing because of the ringtone problem.
After converting WAV files to m4r from https://mp3cut.net
This is the ringtone normally used since iOS10.
It seems to go crazy because of this problem.
itunes: 12.7.3.46 / ios 11.2.6
iPhone 6s Plus, iOS 11.2.6