USR files from NavPlanner2 onto SD. On the HDS insert the SD and go to pages-waypoints, routes and trails-SD disc-USR files-import
"are you sure you want to import?"
"yes"
and then give it some time to upload- leave the sd card in there, grab a beer, drink beer, and another. Then go see if you can see your trails and they should be there again when you put your nav card back in. let me know if that works.