I have a mid-2010 MacBook Pro. It has an ExpressPort Slot connection that seems to have no uses without something else to connect in there.
What are the possible things that I could use this port for?
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SATA | Firewire | USB3 ports (usually for external HDDs;) Ethernet ports; Media Card readers; Thunderbolt ports; PCI bus extenders. Sonnettech has quite a few options.