Before I start, no this is not a duplicate of this question. They just happen to have similar titles.
Anyway, I wanted to listen to music on my Moto X smartphone. So like I have always done with every MP3 player and old phone I've had in the past, I just connected the phone to my computer with a USB cord, and then used Windows Media Player to sync the music files to the phone.
As far as I can tell, Google Play Music is the only app on the phone that allows you to play music files. So I opened the app up and set it to "Downloaded Only" in the sidebar menu. Then I went to "My Library," but to my surprise many of my songs weren't there!
With the phone hooked up to the computer I can look in the Moto X's "Music" folder, and all my songs that I synced are there. But inexplicably some albums don't show up in the Google Play Music app. Can anyone tell me why this is and/or how to get it so I can play these files? Thanks!