- Cannot write on game cards (not even for game saves, it seems), all goes on the internal 32GB flash memory.
- Expanded storage via microSD already taking up to 2 TB, even if nobody will have those cards at home at launch.
- The system is actually ready to take external USB drives for additional storage, but as it'd be via those ports on the dock, you wouldn't be able to take games with you, so Nintendo is still looking at it and thus this option won't be active at launch.