An Event File saves all data and settings for your event like participant data, settings, pictures, times.

Usually one event file contains the data for one event which usually contains serveral contests (like 5K, 10K and half marathon). In some cases one event file can also contain the data of an entire race series.

When working offline, the event file is saved to your computer and has the ending ".ses" which stands for "Sports Event Server" since the Sports Event Server is the actual program which works with the file and supplies all other programs with data.

As all data is saved in this file, you can copy the file onto another computer without a problem, or send it via email. When opening it on another computer, you get the exact same results, lists, certificates etc.