An audio file cannot be played.
- MP3 files in MP3 PRO format cannot be played.
- If you use a partitioned USB device, only audio files on the first partition can be played.
- Playback is possible up to 11 layers (including the root folder).
- There are more than 998 folders (including the root folder).
- There are more than 998 files.
- Files that are encrypted, protected by passwords, etc. cannot be played.
