erase all folder in cd

You can erase all the files at one time on a rewritable disc, such as CD-RW, DVD-RW, DVD+RW, or DVD-RAM discs. You can do this for discs that use either the Live File System or Mastered disc format. The following steps for erasing a disc won't work for recordable discs, such as CD-R, DVD-R, or DVD+R discs.
1.
Insert the rewritable disc, such as a CD-RW, DVD-RW, DVD+RW, or DVD-RAM disc, into your computer's CD, DVD, or Blu-ray Disc burner.
2.
Open Computer by clicking the Start button Picture of the Start button, and then clicking Computer.
3.
In Windows Explorer, click the CD, DVD, or Blu-ray Disc burner icon.
4.
On the toolbar, click Erase this disc, and then follow the steps in the wizard.