How do I format a 400gb usb drive in fat32 on windows 11?

Hello Dave, thank you for reaching out to the Microsoft Community. I'm here to help with your questions or issues. Just note – this is a place where passionate Microsoft users help each other, we don't work directly for Microsoft.

As for your question, Windows 11's built-in tools still can't directly format drives larger than 32GB to FAT32 because FAT32 has limitations with large storage sizes.

However, you can use the Diskpart command-line tool to format your drive. Here's how:

1. Open Command Prompt as an administrator.
2. Type diskpart and press Enter.
3. Type list disk to see connected drives, and find your USB drive.
4. Type select disk # (replace # with your drive's number) and press Enter.
5. Type clean and press Enter.
6. Type create partition primary and press Enter.
7. Type select partition 1 and press Enter.
8. Type format fs=fat32 quick and press Enter.
9. Type assign and press Enter to assign a drive letter.
10. Type exit to close Diskpart.

Be aware that formatting might take some time, and FAT32 has a 4GB file size limit.

If you have any more questions, feel free to ask—I'm here to help!

You can only format drives of 32gb or less as Fat32 in disk management

It says it's in some new build 27686. So maybe it's not released yet.

Microsoft have introduce abillity to use FAT32 up to 2TB disk, but at the moment this is available only for Insiders in latest Canary channel Build 27686.

There isn't any word if this feature will be available on Windows 11 v24H2.

Search it.