Data storage method and device

A method for storing data comprising:

• providing a first optically non-linearly responsive substrate having a plurality of micro-holograms therein, said micro-holograms being indicative of the data;
• providing a second hologram-supporting substrate;
• illuminating the plurality of micro-holograms in the first substrate through the second substrate, thereby producing a plurality of micro-holograms in the second substrate indicative of reflections of the plurality of micro-holograms in the first substrate;
• providing a third hologram-supporting optically non-linearly responsive substrate;
• and,
• illuminating the plurality of micro-holograms in the second substrate through the third substrate, thereby identically replicating the plurality of micro-holograms in the first substrate in the third substrate.