2 Ports 6Gbps eSATA III ExpressCard ExpressCard 34 Supports 6Gbps eSATA ports x 2 Support HDD size at 2000GB(2TB) or higher Compliant with ExpressCard 1.X/2.0 Specification, supports communication speed of 2.5Gbps & 5.0Gbps Compliant with SATA 3.0 specification, supports communication speed of 6Gbps, 3Gbps and 1.5Gbps