I lost an activity on my Garmin Edge 500 from a ride this week when my system locked up. Fortunately, I had tracked the same ride with Strava, so had a .gpx file to work with. I was able to upload the .gpx file to Garmin Connect, then transfer it to my Edge, but it is being recognized as a Course, and not an Activity. I would really like to have it added to my total rides and mileage, but I do not know how to name the .fit file, not recognizing what all of the numbers on the Activity .fit filenames signify. The first three are obviously the date, but I have no idea what the others indicate.

Is there a way to edit this filename to be recognized correctly by my Edge500 as an Activity? Does anyone know what the filename format is for the Edge Activity .fit files?