I have inserted my memory card into the Archos but its contents do not show up in the Music library. Why?
Your music files may not be tagged, which means they do not contain any data about artists, titles, or albums. As a result, the files cannot be classified in the Music library categories. To force the Archos to refresh the Music Library, go to MENU > Settings > System and change the USB mode to Hard Drive. Now the button “Update the ARCLibrary” will be enabled and this will recreate your Music library.