Assuming your computer is on the same network as the beomedia (and you are using a windows pc) in windows explorer / my computer you should see a network drive for the beomedia1 with 4 folders, favorites, music, photos and system. You can drag and drop files or remove what you dont want directly from there.
Regards
Peter
My B&O - BS3, BV4-50, Beomedia 1, BS3200, DVD1, BL8000, BL6000, BL3, BL2, BL7.4