Previously, users were blocked from installing when connected to a USB flash drive or memory card.Windows10 May 2019 feature update. Affected users will receive an error notification indicating that the PC cannot be upgraded to Windows 10.
In this regardMicrosoftIndicates that this problem is caused by incorrect allocation of disks during the installation process and has been resolved. Safeguard Hold, the update blocking limit, has been removed and can be checked for available updates via the Windows Update page in the next 48 hours.
In addition, Microsoft has removed upgrade blocking restrictions for users using Dolby Atmos headsets and home theaters. Microsoft said in the support document: "This issue has been resolved and Safeguard Hold has been removed. Please note that it may take up to 48 hours before the check can be upgraded to Windows 10 v1903."
Most of the problems that exist in Windows 10 Version 1903 have been fixed, and provide a smoother and better upgrade experience than previous feature updates, greatly reducing errors.