Nintendo_Switch
Yuzu
Keys
no title keys needed for yuzu.
we only need the prod.keys.
Location AppData\Roaming\yuzu\keys
Firmware
ROMs
You can get your nintendo switch roms from the nintendo switch hardware and open it with custom firmware to load it on your emulation system.
Location of Firmware
AppData\Roaming\yuzu\nand\system\Contents\registered for Yuzu