Adaptec's USB 2.0 drivers allow your Adaptec USB2connect, DuoConnect and XHub products to work with USB 2.0 devices at speeds up to 480 megabits per second. These drivers are 100% compatible with all USB 1.1 devices as well. Please read the included README file for the latest technical enhancements and limitations of these drivers. Download Adaptec USB 2.0 Driver version 3.1 for Windows