Yea sounds like some kind of tablet device.
The thing is when you use the media creation tool it will FIRST download ALL the data to the local drive. Once that is done it makes the ISO/Bootable drive. Sounds like it didn't remove the local files.
Find a ~windows.bt folder on the C Drive. May have to show hidden folders. Delete that. That is usually the temp files downloaded.
Also wouldn't hurt to run a Disk Cleanup and make sure to select the System Items button once the menu comes up and just remove everything. This will help free up space. Any old windows version, unneeded update left overs etc.
I got a Winbook with 32GB eMMC. I was able to do a fresh install of windows, deleting the recovery partition, freeing up like 4Gb of...