So what if your Macbook Air only has one USB port. Fear not, for you only need one with Belkin's Thunderbolt Express Dock. Thunderbolt technology allows you to daisy-chain up to 5 devices all together using a single cable plus 3 USB ports lets you add more to the mix. With a data transfer rate of up to 10Gbps, syncing files between all your devices is a cinch.