Between the 21st and 22nd, the game asked for 11,000 MB of free space during loading. I made the necessary space, but the game did not free it again once the new game files had finished loading.

I therefore deleted the download folder from my Steam files, ran the content verification, and launched the game. It downloaded another 1.5 GB when starting up, but overall I recovered roughly the 11 GB of space.

With component prices being what they are at the moment, you need to be careful about the resources being used. I also find that, on mobile devices, the game consumes far too many resources for what is essentially a card game.