Optical storage:staff you can see and it has to do with light. We store things in storage, optically. Do not ever put a CD or a DISC in microwave.CD-RAM has three parts:-front label that you can see about it,-inside the CD-RAM,-reflective medal surface.
The most delicate part is front. The CD has millions of pits. The laser shines on bimary code and it sees pits and it does not. There are 5 billions of little pits on a disc. Do not scratch the disc or CD, it will be damaged. The worst scratches are side ways and arounds. These ones damage the disc more. The disc motor is spining, the laser goes up and down and reads the disc. A hard drive is not optical. A floppy disc is storage. It has 1.5 bytes. When you open inside a floppy disc,be careful about your eyes. Inside it as you could see, it is made of medal and plastic. It works with electrocity and magnisium. We should not put floppy anywhere otherwise it will be damaged and will not work properly. A hard drive disc is hard. A floppy disc is soft. Hard drive has billions of little pits. It is storage and bimary.