If this is more a question of hardware than BC, please delete it.
I create tracks in BC, then transfer them to my Montana, to be followed while kayaking. Frequently, a new track overlaps a previous track. On BC, I know how to filter out the old track while creating the new one. But, on the Montana, while kayaking, both the new and old track show.
Is there any way of filtering out the old track, like I can do on the PC, using subfolders?