What's a good app for managing media files? I prefer to manually organize my media (music, podcasts, video) on my SD card using a file manager (as opposed to letting the media player organize it all by tags, because it mixes music with podcasts and doesn't organize untagged files).  

I've been using the "File Manager" app which works fine, but the problem is when I select and play a file with it, it will play in the player of my choice but when I 'minimize' the player the audio stops.   It seems that when I manually select a file to play it's not opening the file and letting it run in the background while I multitask.   

Any tips or app recommendations appreciated !
Just saw this: Music Folder Player