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ISO

How to erase a CD-RW in OS X and Windows

OS X

Interest the CD-RW 
Open the program "Disk Utility"(found in Applications-Utilities)
Navigate to the targeted CD and click Erase, make sure have selected the device icon and not the volume icon.

Windows

Click Start
My Computer
Navigate to the CD and right click and then click "Erase this CD-RW"

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