The old (and still possible way) was to hook up a computer to the serial port and externally log data to a laptop using a serial capture program like hyperterminal. However, with the 5.0 firmware update, you can configure internal datalogging of practically all of the EFIS and EMS parameters. Take a look at the latest installation and pilots users guide for details about this capability. To extract the logged date, you use the same Dynon Product Support Program that you use to update the product.