Garmin Nuvi 40LM vs Garmin Nuvi 52: What is the difference?
nüvi® 40LM | Garmin
MEMZI PRO 16GB Class 10 90MB/s Micro SDHC Memory Card with SD Adapter for Garmin Nuvi 30, 40, 50 or 60 Series Navigator Sat Nav's : Amazon.ca: Electronics
About Memory Cards, Transferring Files from Your Computer, Installing a Memory Card - software | Garmin nuvi 40LM | Owner's Manual (Page 21)
SD Memory Card Sizes for Automotive Devices | Garmin Customer Support
SD Memory Card Sizes for Automotive Devices | Garmin Customer Support
nüvi® 40LM | Garmin
How to install your new Garmin map on Garmin GPS from a micro SD card - YouTube