Microsoft has quietly removed one of Windows’ most enduring technical anachronisms. With the release of Windows 11 Insider Preview Build 26220.8165 (KB5083635) to Beta Channel participants on April 10, 2026, the company increased the maximum size for formatting FAT32 volumes via the command line from 32 GB to 2 TB — a restriction that had gone unchanged since the Windows 95 era, roughly three decades ago.

The same change shipped simultaneously to the Dev Channel as Build 26300.8170 (KB5083632), with both builds carrying an identical feature set. Beyond the headline FAT32 expansion, the update bundles several other storage and usability improvements that Microsoft says target long-standing friction points in the operating system’s storage management interface.

Why the 32 GB Limit Existed

FAT32 was introduced with Windows 95 OSR2 in 1996 as a successor to FAT16, primarily to allow support for larger hard drives without switching to a more complex file system. However, even at the time of its introduction, Microsoft began steering enterprise and power users toward NTFS, which offered features like journaling, file permissions, and better reliability on larger volumes.

The 32 GB ceiling Microsoft imposed on FAT32 formatting was a deliberate design choice: large drives were becoming more common, and FAT32’s susceptibility to fragmentation and lack of journaling made it a poor candidate for primary system volumes. By capping the format command at 32 GB, Microsoft effectively pushed users toward NTFS for internal drives and, later, exFAT for portable and removable storage.

What made this restriction particularly frustrating for users was that it was entirely artificial. FAT32 volumes larger than 32 GB could always be read by Windows if they were created on another operating system, through PowerShell with administrative privileges, or via third-party formatting utilities. Windows simply refused to create them through its native format command and graphical disk tools.

“When formatting disks from the command line using the format command, we’ve increased the FAT32 size limit from 32GB to 2TB.”

— Microsoft Windows Insider Blog, April 10, 2026

What’s Changing in Build 26220.8165

The April 10 builds deliver several notable improvements. Here is the full set of changes as documented in Microsoft’s official release notes and verified by independent testers:

Who Benefits from the FAT32 Change?

The practical impact of the 2 TB FAT32 limit is primarily felt in cross-platform and legacy compatibility scenarios. FAT32 remains the file system of choice for several use cases where wide device compatibility matters more than advanced features:

Gaming consoles and media devices: Many older game consoles (PlayStation 3, Xbox 360, certain PS4 modes) and standalone media players require FAT32 for external storage compatibility. Users managing drives for these devices previously had to rely on third-party tools like guiformat to exceed the 32 GB barrier.

Embedded systems and industrial hardware: Many embedded controllers, automotive infotainment systems, and industrial devices read FAT32 because of its simplicity and near-universal support. Being able to natively prepare larger FAT32 volumes on Windows simplifies workflows for engineers and technicians.

Bootable media and cross-OS workflows: FAT32 is readable by virtually every operating system without additional drivers. For users who need a large drive accessible on Linux, macOS, and Windows simultaneously — without relying on exFAT driver support — a natively formatted FAT32 volume is now a viable option up to 2 TB.

A Brief History of the Change

Important Limitations to Keep in Mind

While the change is significant, it is important to understand what it does and does not do. The expanded limit applies exclusively to the command-line format command. The graphical disk formatting interface in Windows Explorer and the Disk Management tool have not been updated in this build — users wishing to format a drive larger than 32 GB as FAT32 must still use the command line or PowerShell.

FAT32 itself also retains its intrinsic limitations that no Windows update can change: individual files are still capped at 4 GB, the file system has no journaling capability (making it less resilient to unexpected shutdowns than NTFS or exFAT), and it does not support file permissions or encryption. For most general-purpose use on Windows, NTFS remains the recommended choice for internal drives.

Outlook

The arrival of the FAT32 expansion in the Beta Channel — a stage closer to stable than the Dev or Canary channels — suggests Microsoft is more confident in the change and actively preparing it for broader rollout. Analysts who track Windows Insider patterns note that improvements reaching the Beta Channel typically appear in stable releases within a few months, though there is no formal commitment.

Combined with the substantial performance improvement to storage settings navigation — verified independently to make disk property loading nearly instant — Build 26220.8165 represents one of the more practically impactful Insider releases in recent memory, addressing decades-old pain points rather than adding new surface-level features.

Users enrolled in the Beta or Dev channels can obtain the update via Settings › Windows Update. Those not enrolled in the Insider Program will need to wait for any eventual stable release.