This document discusses optical storage and 3D optical data storage. It describes how optical storage works by using lasers to burn data into optical disks in a spiral track. 3D optical storage can store data in three dimensions rather than two, potentially storing much more data in the same physical space. Some challenges to commercializing 3D optical storage have been destructive reading processes and issues with media stability and sensitivity. The document outlines the basic components, processes, and form factors of 3D optical storage systems.