Add an internal SATA port & an external SATA (e SATA) port to your desktop computer through a PCI Express expansion slot. This PCI Express SATA Controller Card means that you can turn a PCI Express (1x) slot into one internal SATA & one external SATA (e SATA) connection. Supporting SATA 300 (SATA II) hard drives & data transfer rates of up to 3 Gbps, this controller card is the perfect solution if you need an extra SATA port or want to externalize your storage.