Mike is right. You need to use the “export” feature and in older software it this used to be its own menu (Export All Nav Data) under the Nav menu tab.
In the newer software versions it was moved into the “Waypoints, Routes, Tracks” menu, which is also under the Nav main menu tab:
- Go to the “Nav” menu tab in the main tabbed menu system.
- Scroll down to the “Waypoints, Routes, Tracks” menu by using the Down Arrow.
- Open this menu by using the Right Arrow.
- Scroll up to the “Options” submenu by using the Up Arrow.
- Open this menu by using the Right Arrow button.
- Select the “Select All and…” menu by using the Down Arrow.
- Use the Down Arrow to select the “Export” option.
- Use the Right Arrow to select “Yes” to answer the question shown on the unit display.