Alain, you need to copy your files using the supplied software, because the card has folders for each type of file; technics, midi, audio etc and writes an inf file with the contents. If you copy and paste directly to the card from explorer the correct inf file is not created, and the files not seen.

Initially you have 99 folders, each with 20 technics loads, thus 1980 technics loads possible if they all fit on the card, and additional separate menus for midi files and audio files.

Also you can program playlists. You can have 99 playlists, from 999 songs, each playlist can have 99 songs. In addition you have a favourites system for files on the card with 40 pages of shortcuts, with 9 titles in each page, similar to the menu favourites.