How to Update Garmin GPSMAP 64st Manually: Step-by-Step Guide

Updating your Garmin GPSMAP 64st manually gives you full control over your device’s firmware and maps, allowing you to manage storage, install specific updates, or troubleshoot when automatic updates are not working. Manual updates are especially useful for advanced users or when Garmin Express is unavailable.

This guide explains how to update your Garmin GPSMAP 64st manually in simple steps.

Why Update Manually?

Manual updates are useful when:

You want to install updates without using Garmin Express.
You need to manage storage on internal memory or a microSD card.
You want to install a specific firmware or map version.
You encounter issues with automatic updates.

Updating manually ensures your GPSMAP 64st stays accurate and reliable.

Step 1: Download Update Files

Visit the Garmin Support website.
Navigate to GPSMAP 64st under handheld GPS devices.
Download the latest firmware or map files compatible with your device.

⚠️ Only download files that match your device model to prevent errors.

Step 2: Connect Your GPSMAP 64st to Your Computer

Turn on your GPSMAP 64st.
Use a USB cable to connect it to your computer.
The device will appear as a removable drive on your computer.

Step 3: Transfer Firmware or Map Files

For Firmware Updates:

Locate the downloaded firmware file (usually a .gcd or .img file).
Copy the file into the Garmin folder on your GPSMAP 64st.
Safely eject the device from your computer.
Restart the GPSMAP 64st. The device will automatically detect and install the firmware update.

For Map Updates:

Locate the downloaded map file (usually a .img file).
Copy the map file into the Garmin folder on your GPSMAP 64st or microSD card.
Safely eject the device and restart it. The GPSMAP 64st will recognize the new map.

Step 4: Verify the Update

Turn on your GPSMAP 64st.
For firmware, go to Setup > System > About to check the version.
For maps, go to Setup > Map > Map Information to confirm the new maps are installed.

Tips for Manual Updates

Back up waypoints, tracks, and routes before updating.
Ensure the device has sufficient battery or is connected to power.
Avoid disconnecting the device during firmware installation.
Only use official Garmin files downloaded from Garmin’s website.
If using a microSD card, format it properly for Garmin devices.

Common Issues and Solutions

Device Not Recognized

Try a different USB port or cable.
Restart both the GPSMAP 64st and your computer.

Update Not Detected

Make sure files are copied to the Garmin folder.
Check that the update files match your device model.

Insufficient Storage

Delete old files or maps.
Use a microSD card for additional map storage.

Final Thoughts

Manually updating your Garmin GPSMAP 64st ensures accurate navigation, updated maps, and reliable firmware performance. While it requires a few extra steps compared to Garmin Express, it allows full control over what updates are installed and how storage is managed.

Regular manual updates keep your GPSMAP 64st ready for any outdoor adventure, providing precise routes and smooth device operation.