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About Memory Cards
You can purchase memory cards from an electronics supplier, or purchase pre-loaded Garmin mapping software (www.garmin.com/trip_planning). In addition to map and data storage, the memory card can be used to store files such as maps, images, geocaches, routes, waypoints, and custom POIs.
Installing a Memory Card
The device supports microSD™ and microSDHC memory or data cards. Insert a memory card into the slot on the device.
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Transferring Files from Your Computer
NOTE: Some computers with multiple network drives cannot display nüvi drives. See your operating system Help file to learn how to map the drives. On your computer, open the file browser. Select the file. Select Edit > Copy. Open the Garmin or memory card drive or volume. Select Edit > Paste. The file appears in the list of files in the device memory or on the memory card.
1 Connect the device to your computer (page 2).
Your device and memory card appear as removable drives in My Computer in Windows and as mounted volumes on Mac computers.
Disconnecting the USB Cable 1 Complete an action:
For Windows computers, click the eject icon in your system tray. For Mac computers, drag the volume icon to the Trash .
nüvi 30/40/50 Owner's Manual