The 150x &200x come preloaded. (Blue trim 150x has World courses, Red trim 150x will display courses)
The 150x (Blue trim)&200x will not display the courses loaded on it, due to it having 33,000+ courses on it. (World courses)
Anything you add or update will show on the righthand box as below and when you arrive at the course the new/updated course will show with an asterix * in front of the course name to differentiate it from the original preloaded course data if applicable.
Our units have auto course recognition which when turned on will show the nearest 5 courses to you. Preloaded courses or added courses on the unit, they will appear when you are closer to them in the list of 5.