How to Erase a CD?

Whether or not you are able to erase a CD will depend on whether it is a CD-R or a CD-RW. A normal CD-R cannot be erased and reused, as they are designed to be written to once only. A CD-RW on the other hand is re-writeable, meaning you can delete and add files at will much like any other sort of disk, including reformatting the media to completely erase the data it contains.