To give you better advice, are you trying to in a specific emulator, or
Downloading this file from third-party websites is generally considered copyright infringement . Nintendo owns the software rights; the only legal way to obtain these files is to "dump" them from your own physically owned, modified Nintendo Switch console. Download File switch-bios-v15.bin
This specific version (v15) is required to play games released around late 2022. If your emulator is not updated to support v15, the file will not work. Recommendation To give you better advice, are you trying
Fake .bin files that are actually .exe installers, adware, or credential stealers. To give you better advice