When it comes to low capacity drives, your are options are the following:
Step 1: Free up space on the drive:
https://www.groovypost.com/howto/maximize-stora...
Step 2: Download and make a bootable copy:
How to download official Windows 10 ISO files
[http://answers.microsoft.com/en-us/windows/wiki...](http://answers.microsoft.com/en-us/windows/wiki/windows_10-windows_install/how-to-download-official-windows-10-iso-files/35cde7ec-5b6f-481c-a02d-dadf465df326)
create a bootable copy
https://answers.microsoft.com/en-us/windows/wik...
Connect an external drive with enough space and turn it on.
Step 2: How to Upgrade to Windows 10 Spring Creators Update on a Drive with Limited Space
https://answers.microsoft.com/en-us/insider/wik...
OR
Block the upgrade and stick with your current version:
https://www.groovypost.com/howto/block-windows-...
Please be advised some users are reporting issues with the Windows 10 1709 update. Make sure you backup before attempting to upgrade:
http://answers.microsoft.com/en-us/windows/wiki...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.