This command brings up a display to export or import data (items) from/to existing modules. Unlike the 'Restore Database' command, this command adds (new) items to the existing module. And also unlike 'Backup Database', you may select which items and which modules you wish to export.
When exporting data from a module, you must select the module(s) to export from/import into. You may also optionally export/import associated objects, such as categories, tags, etc... however be advised that 'files' will be meaningless since there will be no associated 'file' on the server.
You may also import a CSV file to create new users, or also import/export data from eCommerce. using this command.