bowhunter1,
I don’t think that the problem is with the memory cards you are using. It sounds to me like you are still looking for the Export All Nav Data menu that was used in older software versions. Try the following button presses and see if it gets your waypoints onto the memory cards for you:

MENU
MENU
Go to the Nav menu tab > Waypoints, Routes, Tracks menu
Options
Select All and…
Export.