Abstract: A modular storage system for recording media, includes a plurality of folders and a plurality of slipcases for storing at least one folder. Each folder has orthogonal outer dimensions in common with each other folder, and each individual folder is formed from a single paperboard blank and capable of storing therein at least one recording media. Each folder defines a plurality of panels, at least one of the panels being capable of storing a recording media, and the panels being laterally turnable like the pages of a book. Each folder is characterized by the absence of any additional member joining together the panels.