Hi, new to GPS and new to the site, ive got a Etrex30 with OS GB maps installed on an sd card, I have a gpx route I want to add to my device, ive added the file to basecamp and shown the route on the OS map which shows the full 63 mile route, ive then tried to add the route to my device but only the first 42 miles of the 63 miles is showing up, with the maps being on the sd card do I put the route on the card with them or onto the device's internal memory, is there any thing I could be doing wrong as to why only part of a route is showing up, I keep using the word route, but im not to sure the difference between routes, waymarks etc, I do know how to follow a gps once everything is up and running I just can't get my head around my problem, thanks stu