The Millenniata 4.7GB M-Disc Write Once and Read Forever (20 Pack) is for businesses, scrapbookers, photographers, archivists, genealogists, or literally anyone! If you have files, photos, or important documents that you can"t afford to lose then you need the M-Disc. Files are literally engraved on the M-Disc and will never suffer from decay or natural degradation. Plus, the M-Disc is compatible with any DVD player so you can access your files whenever you need them!