Not able to put .m4r ringtone to iTunes

Hello Rishuuu3,

Thanks for the post! I saw your question about adding custom ringtones to iTunes, and I'll be happy to see how I can assist.

When you say it fails, what exactly is happening? If you get an error message, what does it say?

I recommend checking out the "Move custom ringtones from iTunes to your iOS device" section of this resource, also outlined below: Use tones and ringtones with your iPhone, iPad, or iPod touch. If you follow this exact process, how does it work?

Connect your device to your computer.

Open iTunes. Make sure that you have the latest version.

On your computer, find the ringtone or tone that you want to add to your device. If the ringtone or tone previously appeared in your iTunes library, you can find it in the Tones or Ringtones folders of your iTunes media folder. If you created a ringtone in GarageBand on Mac and then shared it to iTunes, it might be in an Import folder. 

Select the tone that you want to add to your device and copy it. (You can use a keyboard shortcut.)

Return to iTunes and go to the Library tab of Music.

Click your device in the left sidebar, then click Tones.

Paste your tone. (You can use a keyboard shortcut.)

I hope this is helpful!

Best wishes.

See Create and manage ringtones in iTunes - Apple Community.

tt2