Mad Dog Multimedia MD-18XTFI MegaStor Triple Format Double Layer DVD Drive For Windows XP and 2000 Desktop PC with available external drive bay and IDE (PATA) interface Performs Like a Virtual Hard Drive - rewrite to the same piece of DVD-RAM media up to 100,000 times Stores up to 9.4GB of data - store up to 9.4 GB of data on a single piece of double sided DVD-RAM media Stores up to 8.5GB of data - store up to 8.5 GB of data on a single piece of double- layer DVD+-R media Horizontal and Vertical Mountable