How to Delete files securely in Mac OS X Leopard

Have sensitive data that you want to make sure you securely delete? Or maybe you're getting an external drive ready to recycle or to give to a colleague. In this video tutorial, you'll find instructions for securely emptying your trash and also securely delete the contents of an external hard drive. For more, and to learn how to remove data from your Mac computer securely, watch this video tutorial from Apple.