Bethesda is typically the king of debuting new insane file sizes for consoles. The PS4 and Xbox One require installs regardless of whether or not you own a game on physical media, so carvng out space for 40GB, especially before external HDD solutions were available for PS4, was a pain. While the Nintendo Switch doesn't neccesarily have that same problem, it can get rough fighting for space on an SD card, especially when some games require an additional download.
You might need to make room for Wolfenstein II, as a new listing for the game reveals that it'll require 23GB of storage, much more than the initial listing of roughly 14GB. The listing even notes it has to be "at least 23GB," as the download presumably doesn't include patches or DLC.
If you don't have an SD card in general and are running off system storage, you may need to plan for this too.
Wolfenstein II [Nintendo]
via destructoid https://www.destructoid.com/wolfenstein-ii-seems-to-be-a-whopping-23-gb-on-switch-much-bigger-than-initially-listed-502913.phtml