![]() These devices work by using a laser to cut microscopic pits into the surface of a storage film. Blu-ray discs are 4.7” in diameter, and depending on how many layers of storage material they contain, can store up to 128GB of data on a single disc ( Source). The discs, which are written and read using an optical drive, come in many different formats the latest and most advanced of which, is blu-ray. ![]() Optical discs, also known as optical storage or optical media, are devices in which large amounts of data can be stored on the surface of a film that is attached to a thin platter made of plastic. ![]()
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