Audio problems

Hi everyone.
I wanted change input usb device sound so i copy the file ‘device-added.oga’ on Desktop meanwhile i copy another sound with the same name in this PATH : /usr/share/sounds/freedesktop/stereo/ but the sound didn’t working, so i copy ‘device-added.oga’ in the same PATH but now also this not working.
May you help me to fix this problem and / or explain me how to change the input usb device sound?
Thank you to everyone.

Does it work if you copy it to ~/.local/share/sounds/__custom/device-added.oga?