Place the microSD/SD card into the computer's card reader.
Press the Windows key + E.
If using Windows 10 or 11, click This PC.
Locate the drive representing the microSD/SD card.
To determine which drive is the microSD/SD card, remove the microSD/SD card from the card reader and observe which drive disappears from the list. Insert the microSD/SD card again to continue.
With Card Inserted
Without Card Inserted
Right-click on the microSD/SD card drive. The drive letter pictured is an example; the memory card may be assigned a different drive letter.
Click Format.
Verify File System is FAT or FAT32.
Format the microSD/SD card to the FAT or FAT32 format. A 2 GB or less card can be formatted in FAT or FAT32. Cards larger than 2 GB should be formatted in FAT32.
If an option is not given to format the card in FAT32, it is recommended to switch to another microSD/SD card no larger than 32 GB. Cards larger than 32 GB (for video recording) are typically formatted in exFAT.
Change Allocation unit size to Default allocation size.
Ensure Quick Format is checked.
Click Start.
If at any point during the format process an error is received or formatting the microSD/SD card fails to resolve the issue, try a different microSD/SD card. These steps will format the microSD/SD card to be readable by the Garmin device.