That way the files sort naturally, and can be added to playlists etc in the right order. Since we know how many lessons are present before they are downloaded, the width of the format-string can be dynamically set to the number of digits in the biggest number (usually will be 2).
That way the files sort naturally, and can be added to playlists etc in the right order. Since we know how many lessons are present before they are downloaded, the width of the format-string can be dynamically set to the number of digits in the biggest number (usually will be 2).