Memory Card Error
Garmin GPS Navigation Device
Severity: ModerateWhat Does This Error Mean?
Your Garmin cannot read the microSD card installed in the device. This is usually caused by a corrupted card, a card that is not properly seated, or a card that is not formatted correctly. Some Garmin models require the card to be formatted as FAT32.
Affected Models
- Garmin DriveSmart 65
- Garmin DriveSmart 86
- Garmin RV 890
- Garmin Overlander
- Models with microSD slot
Common Causes
- Memory card not fully seated in the slot
- Card is corrupted or failing
- Card formatted as NTFS or exFAT instead of FAT32
- Card capacity too large for the device
- Damaged card contacts
How to Fix It
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Remove the microSD card and reinsert it firmly until it clicks.
A partially inserted card will not make proper electrical contact. Push until you feel a click.
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Check the card for physical damage — bent contacts or cracks mean the card needs replacing.
microSD cards are fragile. Even small damage to the gold contacts causes read errors.
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Format the card as FAT32 on a computer and try again.
Use your computer's disk format tool and choose FAT32 (not NTFS or exFAT). Garmin devices require FAT32 for external cards.
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Try a different microSD card — preferably Class 10 or UHS-I rated.
Slow or low-quality cards can cause read errors. Use a reputable brand (SanDisk, Samsung) and a speed rating suitable for navigation.
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Reinstall maps to the card using Garmin Express after formatting.
After formatting, reconnect to Garmin Express to restore the map data to the card.
When to Call a Professional
If a new, correctly formatted microSD card still shows an error, the card slot on the device may be damaged. Contact Garmin support — hardware repair is needed.
Frequently Asked Questions
What size microSD card does Garmin support?
Most Garmin GPS devices support cards up to 32 GB formatted as FAT32. Some newer models support up to 64 GB or 128 GB. Check your device manual for the exact supported size.
Can I put regular files on the same SD card as Garmin maps?
No — the microSD card in a Garmin should only contain Garmin map data. Mixing other files can confuse the device and cause errors. Use a separate card for any non-map data.