Cd albums or music cds are mediums of data hard drive. They can be employed to store info that could be used by a computer. They retail outlet video and audio recordings that want an audio and video guitar player. A compact disc is made of plastic material. A magnets film is positioned in the middle of two plastic-type material discs. This magnetic film is the most essential part and saves all the info. COMPACT DÄ°SC racks have received immense popularity over the years.