Memory Box is a form of memory storage within Phantom Dust. They can be anything from letters to videos. Contained below are pages that are the letter type memory boxes. You get them throughout the single player campaign by completing missions. You find them on the surface or are given them by those you defeated.
Memory boxes that contain video can be viewed anytime by visiting Mikan in the infirmary.
Due to length the memory boxes are split up into separate pages by loose categories.