What will be the size of the NX inner memory (storage capacity)?

[Frogger]

Iyasu said:

The game size for Wii U games are quite small, but compare it to the game sizes on the PS4 and XBone. They are somewhere between 30GB and 50GB and can be even larger, on the Wii U the games are far smaller because the texture file sizes are smaller. 3rd parties will also want to have a full install on the hdd like on the PS4 to reduce loading times.

I think the NX should aim for 1TB+, and have easy ways to upgrade the space.
I'd love it if you could build in an extra hdd and add usb 3.0 hdds additionally to the one built inside. (Not replace it like how the PS4 handles it)

I think 1TB is a pretty safe bet, and I think it'll be easily upgradable. Just don't know if it will be internal or external again like with the Wii U.