It's true the Nintendo Switch comes with 32GB of internal storage and the ability to add 2TB via a microSD card. Even so, 5GB is a fair chunk of data you'd rather not have taken up with a single save game. Surely no Switch game needs 5000MB for each save? Guess again.
If you visit Nintendo's support page for 2K's NBA 2K18, you'll find details on how much space is required for downloaded updates and the save files:
Below are the storage space requirements:
- Initial software download after purchase – 6.8 GB
- Additional software update – 16.1 GB
- Save file – 5 GB system memory per save file
Yes, that's 5GB per save file, not total. So unless you have external storage, a single profile is about all the device can fit. I think we can safely take the space-gobbler crown from Dragon Quest Heroes and pass it on to NBA 2K18.
It's hard to say why a game like NBA 2K18 would need 5GB per save. For a game like Skyrim, which -- in simple terms -- stores the world state when you save, it's a bit more understandable. I'd be keen to crack one open to find out.