My ipad has an ios update, and it says I don't have enough space.  My SD seems to be using 1GB, and so I temporarily removed all but one country from the list of charts.  It didn't change the space used.  Anyone know if there is something I can do to get it to actually free up this allocated space on the ipad?  Thanks!

Also try under the Airfields tab, bring up the mini Settings menu and use Clear Document Cache. There might be many downloaded AIP documents and plates that you no longer need, and that tool will delete them.