IGN is reporting that Nintendo Switch save data that’s stored internally can not be transferred to another device. So you won’t be able to transfer save data from one console to another, which is a bit of a pain. The day one update brought SD Card support but those who have saved the games to their consoles have no way of transferring them. System save data can only be deleted, not moved or copied.
Thanks to Paidenthusiast and Quadraxis