Not sure that this is really the right place, but..
I have a Nuvi 2599. There are loads of tracks on the internal storage but I cannot find these using windows explorer, so cannot delete them to clear some room, nor can I delete them through BC. It wouldn't be so bad if these didn't show up as grey tracks on BC maps, but I can't even change the track colour to invisible (which would, judging by the tracks created by a 64s, still be thin black lines)
Is there anything I can do, or is this just what I would consider an awful piece of design / programming? Thanks.