Lite-On EBAU108 USB External DVD-Writer for $19.99 shipped after coupon code EMCANKX48. Here is a screenshot for reference. This portable DVD burner is compatible with Windows XP/Vista, Windows 7 and more. It is bus-powered via USB 2.0 and writes DVD at up to 8x speed. This is handy if you have a thin-and-light laptop that does not comes with a DVD drive and you happen to need to read or burn a DVD from time to time.