When using MCG Manager (lower than version 1.0.25), you may experience some problem to transfer a MP3 file without its matching MCG file into an external hard drive. Please upgrade to the latest version of MCG Manager
Also please find attached here a MCG file that will go as a matching file for any MP3 file. Please download, rename it to match the MP3 file, and transfer them (MCG and MP3 files) together as if you would for a karaoke song. The MCG file will display "ENJOY MUSIC" message during the song.