Why ExpressCard? ExpressCard, the new standard destined to replace CardBus, effectively quadruples the amount of available computing bandwidth. This results in faster music downloads, smoother streaming video, and lightning-fast access to mass-storage devices. The Belkin SATA II ExpressCard offers the perfect solution for users who want to add a Serial ATA II port to their notebook computers. The Card is designed to take advantage of the additional bandwidth and features provided by the new ExpressCard I/O interconnection standard. Now you can download multiple large video files at the same time - without worrying that your computer will freeze, crash, or slow down to a trickle. The ExpressCard future-proofs your notebook computer with technology so advanced that it exceeds the processing-speed capability of many devices currently on the market. Installing the ExpressCard now will give you device-upgrade expansion room for many years to come.