Challenges of physically connecting Dragon with the space station are the toughest elements of the mission.

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The unit comes with a docking station for connecting to your computer, but there's also a standard USB port on the bottom of the unit in addition to the docking connector, so presumably you don't need to lug the dock around with you to transfer files on the go.

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On one of these walks, the Swede will move cabling on the exterior of the station in readiness for the arrival next year of a connecting unit, called Node 3 or "Tranquility", and a huge window referred to as the Cupola.

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