Generally all the data to be exported is saved in memory, so the exporting capacities are not huge.
For more complex scenarios I would recommend you to use our Reporting tools
which are built to suit various exporting scenarios.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.