Windows 11 Dev Build 26300.8170 Brings Clearer Secure Boot Visibility and Bigger FAT32 Drives

Microsoft’s latest Windows 11 Insider Preview for the Dev Channel, build 26300.8170, focuses on practical visibility and storage usability rather than flashy new features. For security-minded users and administrators, the standout change is a revamped Secure Boot display in Windows Security that finally gives clear, at-a-glance information about firmware-level protections and certificate health. Complementing that, the build addresses long-standing storage annoyances—most notably removing the 32GB FAT32 formatting limit via command line and smoothing the Settings experience. These changes are rolling out to Insiders via controlled feature deployment and are targeted at making security controls and device management more transparent and less frustrating.

What’s new in Secure Boot visibility

Windows Security’s Device Security area now surfaces Secure Boot status with color-coded badges (green, yellow, red) paired with plain-language descriptions of both the Secure Boot state and certificate condition. This gives end users and administrators immediate visibility into whether the device’s Secure Boot certificate is current or potentially problematic, so action can be taken before a failure occurs. The enhanced view is deliberately disabled by default on enterprise-managed devices and servers to avoid unintended disruption in managed environments, but it’s available to individual Insiders who want proactive firmware-level security signals. Historically, Secure Boot has been a low-visibility control inside Windows; this change aims to close that transparency gap.

Storage changes that matter

One of the most practical updates in this build is a substantial increase to the FAT32 volume formatting size limit when using the command line: the cap has been raised from 32GB to 2TB. For administrators and users who rely on FAT32 for cross-platform compatibility with removable drives, this removes a frequent pain point and expands the usefulness of FAT32 for larger media. Other storage-focused improvements include faster navigation when viewing storage details on very large volumes under Settings > System > Storage > Advanced Storage Settings > Disks & Volumes, and a refined UAC prompt behavior that only appears when interacting with temporary files—rather than every time the Storage settings page is opened. A separate bug that caused Settings > Network & Internet > Data Usage to show unrealistically large values has also been fixed.

Feedback Hub and small polish fixes

This Dev build updates the Feedback Hub to version 2.2604.101.0 with a range of user-driven refinements: improved default window sizing with persistent session memory, restored visibility of community feedback, corrected upvote rendering for Chinese display language users, and support for mouse back-button navigation. These tweaks are modest but meaningful for participants who use the Feedback Hub regularly to report issues and follow progress.

Rollout details and how to get the features

Build 26300.8170 is based on Windows 11 version 25H2 delivered via an enablement package and is available now to Dev Channel Insiders. Many changes are being deployed through Microsoft’s Controlled Feature Rollout mechanism, so not all Insiders will see every improvement immediately. If you want to try to receive features sooner, enable the latest update toggle under Settings > Windows Update; this can accelerate feature delivery for participating devices.

What this means for users and administrators

For security-conscious end users, the Secure Boot visibility enhancements mean fewer surprises: you can now check firmware protection and certificate status before encountering failures. Administrators should appreciate that these indicators are off by default in managed environments, preventing noise or confusion across large fleets. The FAT32 limit increase simplifies workflows for those moving large amounts of data on removable media or sharing drives across different operating systems. Together, the changes reflect a focus on clarity and usability—small but practical improvements that reduce friction for both day-to-day users and IT teams.

Conclusion

Build 26300.8170 doesn’t reinvent Windows 11, but it addresses long-standing usability gaps in both security transparency and storage management. By making Secure Boot status visible and removing arbitrary formatting limits, Microsoft is listening to feedback from Insiders and system administrators. If you’re in the Dev Channel and want to test these updates, check Windows Update and enable the faster rollout toggle; otherwise, expect a staggered deployment as Microsoft rolls the features out more broadly.