A university startup, Folio Photonics aims to make optical films that can hold 1 to 2 TB. As a cheaper, more manageable alternative to storing data on magnetic discs or tapes, the company will use optical technology developed at Case Western Reserve University in Cleveland to make an optical film with 64 data layers. A disc will be on the capacity scale of magnetic tapes used for archival data storage. Suitable for businesses and consumers, the discs also could be useful for pathologists who store not only slides of tissues, but also the digital images they make.