Finding a Windows music player that supports .m3u playlists along with smart playlists stored as files can be challenging. Here are a few options that you may find useful: 1. foobar2000: This customizable music player allows for the creation of smart playlists and supports .m3u playlists. You can manage your playlists as files that can be backed up. Foobar2000 is known for its flexibility and customization options. 2. MusicBee: Another popular music player that provides a wide range of features, including smart playlists and support for .m3u playlists. MusicBee allows you to manage your playlists as files for easy backup and transfer between devices. 3. MediaMonkey: Known for its extensive library management features...