Why won't the map update applications recognize the SD card?

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Garmin Express utilizes microSD/SD cards with compatible GPS devices. Third party software and other connected USB devices may sometimes block the map update's ability to communicate with the microSD/SD card. Disabling or disconnecting other USB devices, along with some basic troubleshooting should allow the map update to recognize the microSD/SD card and install the necessary files.

Troubleshooting suggestions:

A functioning SD card should be detected if these troubleshooting steps are taken.

Referenced Links:

Can I load maps directly to an SD card during a map update?

What is the largest size Secure Digital (SD) card that an automotive device can accept?

How do I format a microSD/SD card?

Change, add, or remove a drive letter

Why is my Garmin mass storage or MTP device not communicating with Garmin Windows applications?

Device supports MTP mode: What is MTP mode and which automotive devices use it?

Windows Media Player 11: How do I determine the version of Windows Media Player

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