A GPX or TCX from your watch β COROS, Strava, Garmin, Apple Health. Or a screenshot of whatever tracked it: Strava, Apple Fitness, Peloton, a tennis app, even the scoreboard. On Strava: open the activity on the website and hit βExport GPXβ in the β― menu (the app doesn't have it).
Any photos you took along the way. Drift reads where and when each was taken to pin it on the map β geotagged photos alone are enough to build a card from.
Anything the card should know β the score, who you were with, how it felt, or how you want it to sound.