This link, and here and here. If you bought a Windows 8.1 WIMBOOT-based tablet with limited SSD storage, and all of a sudden see it is out of SSD space, it should make you wonder, "Has Microsoft, that Fortune 50 giant, thrown a snake into your life and happiness."
And if you did "upgrade" a Win 8.1 device to Win 10, help me by posting a comment on how to get rid of Cortana. Exploring that question alone is a learning experience. Intentionally bloating a range of systems of known capacity limits is inexcusable business conduct (in my view).
If the nation had a real Attorney General instead of a lackey, that person would be jumping all over Microsoft with spurs on, over its recent trade practices. Nadela is worse than Ballmer.