en.m.wikipedia.org/wiki/5D_optical_data_storage
The “5-dimensional” descriptor is only a marketing term, since the device has 3 physical dimensions and no exotic higher dimensional properties. The fractal/holographic nature of its data storage is also purely 3-dimensional. The size, orientation and three-dimensional position of the nanostructures comprise the so-called five dimensions.
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Empricorn@feddit.nl 37 minutes ago
The extra dimensions are time and inception. I now know less about it than when I started.