Why is my Nexus 6P only recognizing MP3 audio files?

[AC Question]

My brand new Nexus 6P will only read music files that are MP3. Not sure why, the Galaxy S4 that I came from showed all of my music (wma, m4a, etc.) but on this device, I can see the files in the device when viewing it from my computer, but none of them appear on my Google Play Music except for the mp3s. I'm using Windows Media Player to transfer, if that helps.

 

[Rukbat]

Phones don't play music files, apps do. Evidently you don't have any app to play wma or m4a files. Try Music Player.