Posted November 15, 2018
Skywatcher64: I ran into the same issue with The Wicher 3 update today. As I can not free up more space om my SSD (read I don't want to uninstall any other games as I am still playing them) I tried starting the game without the updates through the GOG Galaxy and that just worked fine. I miss out on any improvements to the game that the update may have brought but I don't mind, the game plays fine for me.
squid830: If you have space on your non-SSD-drive, you could always copy the whole directory from the SSD to that drive - then do the update there - then copy it back. It's a massive PITA but it should work without requiring you to delete anything else on your SSD.