Microsoft today released one support document that warns Windows 10 users that the upcoming May 2019 Update may not be installed on their systems if they use external USB storage devices or SD cards.
The company reportedly noticed problems with "inappropriate drive reassignment" or "inappropriate drive reassignment" and cites it as the main reason for blocking the May 2019 Update.
"Improper disk replacement may occur on computers that have an external USB device or an SD memory card during the May 2019 Update installation," the company said. "For this reason, these computers are currently excluded from receiving the update."
So if you are using a USB or SD card, you will see the following message if you are trying to upgrade to Windows 10 May 2019 Update.
Fortunately, there is a quick and simple solution to this issue. Microsoft recommends that users remove any external USB or SD media and restart the update installation.
This includes USB drives, external USB hard drives, or SD cards inserted into card readers.
In the long run, Microsoft plans to address the issue of "improper disk relocation" in a future Windows 10 update.
Microsoft will not exclude the May update to all Windows 10 users, but only to those who use April 2018 Update (Window 10, 1803 version) or October 2018 Update (Window 10, version 1809). Users using earlier versions of Window 10 will be able to update May without any problems.