Most likely not true mp3 files. Most likely fake files ... and possibly viruses; Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see). Try playing such files with Vox player & chances are they will not open, yet Vox player can play a massive wide range of audio types of files. Where to find Vox player? Search Vox on the forums or try the Stickies for alternate audio players. (the search function was put onto the forums for a reason lol)