Answer by  
                                                                                          toni02 (73)
                                                            
                          
                          
                                                           A CD-R may have data recorded on it a single time.  After that, you may only view the data that you have recorded, and may not edit it further.  A CD-RW may have data recorded on it multiple times, as well as, have data removed from it.  So, basically, a CD-RW functions similar to a flash drive.