Parallel to that, Microsoft has updated its minimum hardware requirements page to confirm that the lowest storage requirement for Windows 10 update will be 32GB for both 32-bit and 64-bit Windows.
Earlier, the minimum requirement was 16GB for 32-bit , and 20GB for 64-bit WINDOWS
Microsoft has listed that Windows 10 IoT Enterprise, will still keep 16GB as the minimum requirement for 32-bit Windows, and 32GB as the minimum requirement for 64-bit Windows.
This new minimum storage requirement shouldn’t affect many users as most would opt for storage higher than 32GB these days.
However, this will restrict manufacturers from making really low-end offerings.
Make sure your Hard Disk drive is upgraded or make space on your Drive C: to accommodate this update