You can export all contacts by going to the top Contacts tab and clicking Export. To export individual groups, navigate to that group, then click Export.
To export your activities in iCalendar format, click Export on Calendar view.
At this time only we can export your emails and files, and will do so upon your request in Mbox and Zip formats. We plan to make this option available to you so you can do it on your own at some point in the future.