A 64GB flash drive can use FAT32, but Windows built-in format tools may not offer FAT32 above 32GB. FAT32 is useful for devices that require it, but it cannot store a single file larger than 4GB.

Step 1. Select the 64GB flash drive by capacity and drive letter.

Step 2. Choose Format for the target USB partition.

Step 3. Select FAT32 as the file system and enter a volume label.
Step 4. Preview the operation and confirm the correct USB drive is selected.
Step 5. Click Proceed and test the USB on the target device.
A 64GB flash drive is not too large for FAT32, but Windows may hide the option. Format it as FAT32 only when the device requires it.