How to Format 64GB SD Card from exFAT to FAT32

Why can't I format my SD card to FAT32?

Step by step tutorial on how to format a 64GB SD Card from exFAT to FAT32
“I have a Sandisk Ultra 64GB SD card and cannot get it to a FAT 32 format. Tried few links, no success. I am using Windows 10.  Is there any way possible to achieve this?”

Do you have a Raspberry Pi?

Maybe you have another tech gadget that requires FAT32 format, but all you have is a 64GB SD Card.  This article solves that problem, how to format 64GB exfat SD card to FAT 32.

Most devices need the format of FAT32, including the Rasbperry Pi.  The programs that run on a Raspberry Pi, all boot from FAT32. 

We built a Raspberry Pi with a 64GB SANDISK, installing Noobs on it, Raspbian and Eleclite

If you are building a similar project, you can find our instructions on our Software page

We found windows DOES NOT let you format any device over 32MB into FAT32.

This makes formatting an SD card of 64GB hard to handle. 

We tried using CMD/ command prompt to achieve this, and got an error saying “Windows was unable to complete the format”.

With Windows 10, you have an option to use this command:


format /FS:FAT32 X:


Replace the letter X with the drive letter for the external device you wish to format and hit Enter.   

Note – This process may take several hours.

If you do not have Windows 10, and are on Windows 7 or a variation of it, there are other options.

Format 64GB SD card to FAT32 with Windows GUI of AomeiTech partition assistant.

Updated 7/15/21:   A working link to a great Disk Formatting Tool for FREE.  This will format your SD Card from exfat or NFTS to FAT32.  This is a Disk Formatting Tool from Aomeitech.  

Visit the link https://www.aomeitech.com/pa/standard.html, and download the FREE version.  You do not need to pay!

There are plenty of tools out there that will format your SD card from a 64GB exFAT to FAT32.

You just need to do your due diligence to find a safe one.  This technology has been around for a while, so the internet has plenty of links to programs for this. 

I found many programs that all claimed to do the same thing, but my top interest was security. 

We found a simple program referenced in multiple forums, with reviews from those forums.  So we cross referenced with an internet search for that program name, and went way past the first couple pages.

Then we repeated that process on a couple different search engines. 

After the exhaustive searches, we tested with Norton Antivirus, and it was deemed safe.  The tool, Aomei Partition Assistant, can be found at https://www.aomeitech.com/pa/standard.html.

This Aomei Partition Assistant has been deemed Safe by Norton Antivirus

It works just as advertised, it formatted my SANDISK 64GB Micro SD Card from exFAT to FAT32.   It did so in about 30 seconds.

Simply right click on the disk you want to format, and click Format. Then choose FAT32

This program works excellent for this specific task. For anything else, 32GB and less, you may use the SD Memory Card Formatter from sdcard.org.  Just remember, it will format anything larger than 32GB as exFAT automatically, and you need a tool like the one above as a workaround.