What is a CD-R / CD-RW?
CD-R stands for CD-Recordable. CD-Rs are write-once media, meaning that once you write information to the disc, you cannot erase it and write new information to the disc. They can be used with a standard CD player. CD-RW stands for CD-Rewritable. This allows you to erase discs and reuse them. CD-RW media does not work in all players.