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May 2019 Windows 10 version 1903 heads up
Folks!! The next version 1903 went live on MSDN a week ago, already installation with SD cards and/or external USB devices connected are causing install failure. Please read the writeup here at Neowin. Defer this if you are on the Pro or Enterprise installs of Windows 10. Microsoft most likely isn't going to fix the issue before 1903 goes live for public consumption.