I'm new to Spotify, but have used other services like Rdio and Deezer. In both of these, there is an easy and obvious way to show only your synchronized files, so that you can browse and play freely without the worry of having in internet connection.
But I couldn't find this at all in Spotify. There is not a "Synched music" section and there is no way to filter "synched files only" in the "Your music" section.
Why is that? I believe this is a must-have feature for an app/service such as this.