You can convert an existing partition-based EmuMMC or create a new one:
EmuMMCini Portable – User Guide v1.0
Welcome. EmuMMCini Portable is designed for Switch modders who need EmuMMC management without a PC. You will need: emummcini portable
No part of this tool writes to boot0/boot1 without confirmation. Always keep a backup. You can convert an existing partition-based EmuMMC or
Author: Research Unit for Embedded System Exploitation
Date: April 2026
Version: 1.0 Welcome
The emummc.ini file is a critical configuration component in Atmosphere-based custom firmware (CFW) for the Nintendo Switch, defining the path or partition used to boot an emulated NAND (emuMMC). However, static configurations limit users who maintain multiple emuMMC instances (e.g., online-safe, offline, development, or legacy firmware). This paper introduces the concept of emummc.ini portable — a software utility and methodology that enables dynamic selection, validation, and hot-swapping of emuMMC profiles without reflashing or manual file edits. We discuss its architecture, security considerations, and implementation constraints.