Windows 10 computer must remove USB or external memory card to upgrade to Windows 10 May 2019 Update
windows 10 computers running windows 10 april 2018 update (or 1803) or october 2018 update (or 1809) if an external usb device or sd card is connected, it will be blocked fromUpdate Windows 10 May 2019 Update requires up to 32GB of free hard disk space when installed
on the minimum hardware requirements page, microsoft has announced the requirement for manufacturers (oems) to leave 32gb of memory on computer devices to update windows 10 may