CloudStorage.service.documentStore.addEventListener( DocumentStoreEvent.UPDATE_START, updateStartHandler );
CloudStorage.service.documentStore.addEventListener( DocumentStoreEvent.UPDATE_END, updateEndHandler );
CloudStorage.service.documentStore.addEventListener( DocumentStoreEvent.FILES_DID_CHANGE, filesDidChangeHandler );

...

private function updateStartHandler( event:DocumentStoreEvent ):void
{
	trace( "update started" );
}

private function updateEndHandler( event:DocumentStoreEvent ):void
{
	trace( "update completed" );
}

private function filesDidChangeHandler( event:DocumentStoreEvent ):void
{
	trace( "files did change" );
	// This will list the documents that have been changed
	for each (var document:Document in event.documents)
	{
		trace( "changed: "+document.filename );
	}
}
// com.distriqt.CloudStorage