Question: what is emunand nintendo switch?
Answer: emuNAND stands for emulated NAND, this means that your entire NAND (system memory) will run off your microSD card with Custom Firmware (CFW). This NAND's contents (games, applications, saves, etc.) are completely separate from your sysNAND. emuMMC is the name for the currently used implementation of emuNAND on Switch.