If you are unable to locate a dealer or website where authentic compatible SD cards are available for your device, it would be more sensible to invest in a new device altogether.
Suppose you are facing technical issues with your device as well (some users have known to complain that the device hangs or freezes, and this sometimes coincides with the fact that the maps have become outdated, as the navigator displays a message asking you to update them), check if the device you own is still under warranty.
Follow the instructions to get Garmin Express running on your machine.
More on this you don't have free product lifetime map updates available to you, purchase Garmin street map updates here.
You may purchase street map packs as downloads, or as SD card updates.
I actually prefer SD card updates for their simplicity and ease of use.
So what must you do if your You need to determine how old your device is.
After reviewing the information for your model, refer to the "how to" articles at the bottom of this page for upgrade instructions.Another big change in map updates is that more of them are free.Garmin and other GPS makers have transitioned in a significant way to free product lifetime map updates for a range of products including sports and golf GPS.Updated maps are available for the following Nextar GPS devices:3.5” M3 Portable Navigation Series: Models accepting the new map upgrades are the M3, M3-02 and M3-06.Common features for the M3 Series devices include: 3.5” touch-screen display, maps of the 50 US states from NAVTEQ®, text to speech, voice-guided directions; turn-by-turn voice prompts, instant route recalculation, 1.6 million points of interest, built-in speaker, 2D or 3D map viewing modes, day and night modes, MP3 playing & JPEG viewing and more.4.3” Q4 Portable Navigation Series: The most popular members of the Q4 family including the Q4, Q4-01, Q4-03 and Q4-04 now have map upgrades available.But for many map options, especially international street maps beyond those you purchased with your unit, you will have to pay.