I'm having some trouble uploading multiple GPX files (tracklogs) to my Garmin 78. The manual says the 78 can store 200 tracklogs of 10,000 points each. I'm manually dropping the files into the 78's memory. The problem is they are not showing up on the 78's screen. I've tried putting them into J:\Garmin\GPX and J:\Garmin\GPX\Archive. Any tips?