Using Nero you can not only create CDs and DVDs, but also erase rewritable discs (CD-RWs, DVD+RWs and DVD-RWs). However, you can only do this if you have a recorder which can also write to these types of disc.
There are two erase methods available: 'quick-erase' and 'full-erase'.
Quick-erase: The data is not erased fully from the disc. Only the references to the contents of the disc are deleted. The disc appears to be empty, although it is not really empty. This means that it is possible for someone else to restore the contents. Do not use this method for discs which contain confidential data. Erasing a disc using this method lasts between 1 and 2 minutes.
Full-erase: All the data is deleted from the disc and cannot be restored. The time needed to erase a disc using this method varies depending on the type of disc.