Abstract: A compact disk storage device has a base and a hinged lid. The inner surfaces of the base and lid each contain arcuate ribs which are parallel to and equally spaced-apart from one another. Each pair of adjacent ribs defines a shallow groove. Each rib in the base has a height which varies along its length. The upper edges of the ribs located near the front edge of the base are generally pointed. The upper edges of the ribs located near the rear edge of the base are generally blunt and shorter than the ribs near the front edge. The lesser cross-sectional dimension of the ribs near the rear edge allows the disk to seat properly in the groove without hindering its alignment.