Describes the cause and action for error messages.
upgrade cannot determine free space
Windows 10 Inplace upgrade - 1803 - Microsoft
6 Helpful Ways to Fix Not Enough Space for Windows 10 Update
There's a workaround for people who can't install Windows 10 due to ...
Solve "Not Enough Disk Space Upgrade to Windows 10" Problem
Not enough disk space for installing Windows 10 Creators Update [Fix]