Where it asks for user ID.
That sounds like it is an issue on the Asus devices part then, since the PC itself functions just fine. The issue is how the folders are displayed, and the fact that the Realtek interface (Asus just makes the package) is rather terrible. Are your MP3s all in one giant folder, or are they grouped into a bunch of folders (one folder per artist for example)? Is is the same files not appearing repeatedly?