Is it the stock media player or the OS in general.....

[wannawhat31]

The way that the media player sorts my music is annoying I wish I could make play lists from the sd card otherwise I have to add the proper tags to all songs. Anyway whenever I use a file explorer to find a song itll play but if I navigate away from it, the song stops. Is there a fix? Or is there a player that won't do this but is also integrated with the lock screen?