I am using Lumia 720 and all the music files except .mp3 are lost in the phone. I am not able to find it. Please help.
The built in music app will happily play most common music file formats, like mp3 or wma. In your comments, you refer to avi, which is a video format, rather than a music format, and as long as that is using a supported codec, it should be playable in the videos app