The new Elgato Thunderbolt SSD is about the same size as other portable drives that are based on the 2.5-inch internal drives often found in notebooks.
The Elgato itself is based on an SATA 6Gbps solid-state drive, the fastest internal drive type on the market. This is because the Thunderbolt standard offers even faster than that in terms of bandwidth--up to 10Gbps.
The Elgato drive comes with just one Thunderbolt port, used for both power and data connections. The Thunderbolt cable itself is not included but sold by Apple for another $50.
Currently, Apple offers only one size for the Thunderbolt cable, which works better for desktop drives than for a portable drive like the Elgato Thunderbolt SSD. Elgato said that there will soon be a new Thunderbolt cable that's shorter and possibly even thinner which would better suit the portable solution.
As it requires no external power adapter, the Elgato Thunderbolt SSD makes a perfect companion for mobile users.
And it'll be an even better companion with a new, shorter Thunderbolt cable.