Garmin Astro DC 40 Owner's Manual page 71

or purchase preloaded detailed map
data cards from your Garmin dealer.
In addition to map and data storage,
the memory cards can be used to
store files such as images, cartridges,
geocaches, routes, waypoints, and
custom POIs.
1. Remove the battery cover by
turning the D-ring 1/4 turn
counterclockwise and pulling up.
2. Slide up and pull out the metal
cover.
3. Align the metal contacts, and place
the card in the slot.
Astro and DC 40 Owner's Manual
McroSD card cover
McroSD card tray
McroSD card
4. Push in and slide down the metal
cover.
5. Replace the batteries and the battery
cover.
removing a microSD
Card
1. Slide up and pull out the metal
cover.
2. Remove the card from the slot.
Appendix
Astro with Batteries
removed