I generally leave my 700 securely mounted in the plane and bring my updates to the aiport on memory stick. Works well other than that I have to remember or guess what charts etc. were expired.
It would (i) be nice if there was a way to put the stick in the 700 and download to it a list of expired charts from the unit to take home and (ii) really nice if I could upload that file to the AP website when performing an update to automatically 'pre-select' updates files needed.