How do I fix the error "Windows needs more space" while updating Windows?
Systems that have 32GB eMMC disk space may be notified that there is insufficient space while installing large Windows updates or upgrading to Windows 10.
Connect a USB flash drive, external hard drive, or SD card with enough free space to install the update. The drive you connect must be 8 GB or larger (16 GB is recommended). You will need to keep this drive available if you want to use the go back feature in Windows 10 to return to your original operating system.
Note: Some models like the Aspire R3-131T and ES1-111m do not support using an SD card to install the update. You will need to use a USB flash drive when installing the Windows 10 update on these models.