I have a number of routes on my Edge 800. I cannot view the contents of Internal Storage within Basecamp.
Using explorer I can find the named routes in the Courses directory on the device.
All Garmin units work that way like it or not.
No, not all units work that way. You can manage/delete items with BaseCamp on the newer outdoor models like the Montana, GPSMAP 62 and the Oregon 450/550. I guess you never tried it because of your experience with other models...