To expound upon B. Diddy's answer... On my Galaxy S5 with Lollipop (5.1) when I'd connect via USB, and then click on "My Computer", I'd see the phone. And if I clicked on that it would show the phone's internal storage and the SD-card. But when I upgraded to Marshmallow, (6.0.1) it drove me up the wall because when I connected the phone to the PC via USB, I'd have to click the "Allow MTP connection" (on the phone's pop-up screen)
every freaking time that I connected via USB if I wanted to access the files via PC. (Otherwise the PC couldn't see the phone's storage.) It drove me up the wall. I love Marshmallow, but I HATED that. Here's how I solved it...
By the way, there is an awesome Xposed module called
XtouchWiz, which has a whole bunch of tweaks available. One of the tweaks is the ability to run any app in mult-window mode. (So now I can run Waze and Pandora split screen while I drive. Very happy.) Marshmallow+Xposed+NoUSBNotification+XtouchWiz has made my Galaxy S5 perfect. There's basically nothing on my wish list. No desire to upgrade to S7, etc.
AFAIK, unfortunately, there has never been a way to sync your music collection and playlists to Android using Windows Media Player (WMP). If you "sync" using the "Sync" tab on Windows Media Player, it will copy the songs in your WMP playlist to your Android device.
Fortunately, you can just copy the contents of your PC's "Music" folder (which contains your WMP playlists) to your Android Music folder.
If you use MediaMonkey for Windows on your PC, and MediaMonkey for Android, you can automatically sync your music collection and playlists, one-way or bidirectionally.
http://androidforums.com/threads/me...-sync-solution-like-itunes-but-better.852296/