Expresscard Esata II White Box PNY 2-Port eSATA II ExpressCard/34 Adapter General Features: Connects two (2) external SATA II hard drives through your notebook's ExpressCard slot ExpressCard/34 Form Factor Module Supports data transfer rates of up to 300 MB/second Supports Hot-Plugging and Native Command Queuing 300 MB/second is faster than USB, Firewire, or PATA