Can Navilink II read data directly from SD card? It seems that
Navilink can read data from the built-in flash memory of GT31,
convert between several file formats, but where is the option to
read/write to SD card?

When Navilink II begins and connects with GPS it displays
on the (right) column the data found of GPS, which includes
waypoints, routes, tracks,, etc. But where is the data
stored on the SD card?