I have a friend who set up a server and hosts music from his "NAS".
He's got a lot of music on there (2,226 albums) and I can stream it while I work off my phone so I don't clutter up my work machine with a gazillion music files.
I downloaded an app on my phone called DS Audio and I can access his server and stream the music while also downloading the files onto my phone.
It's a pretty slick setup and I like it much better than iTunes. He calls it Scottify.