Protective modular holders for CDs and DVDs can be assembled into a storage assembly from which each disc and its accompanying literature can be removed without opening an individual holder. Two outer elements and an inner element form a module which receives two components, such as a pair of discs, or a disc and a booklet. Each side of the inner member cooperates with the corresponding outer element to form a disc receiving opening with openings aligned or at 90° or 180° offsets. The units are connected at the corners to adjacent units with the openings in selected alignments to form a storage assembly. The assembly may be expanded by connecting additional holder units. The outer elements and inner members cooperatively form a slot and label rail for receiving a label when the elements are joined together. The inner holder member surfaces may include a disc cleaner.