In Prospeqs, a “ride” is created when you tap Add Ride, fill in the ride details (date, location, ride rating, ride type and, optionally, notes), and save. You create a “ride” when you want to jot down some notes about your own riding, or when you want to save a video or photo of you riding.
Media, on the other hand, is just an image or video that’s not yet attached to a ride. Say you video your friend riding during a lesson. You can get that video to her within Prospeqs, by using the Share Media button on the Friends page. When she receives that video, she’ll be able to use it to create a ride.