I can help, but I need to confirm intent: are you asking for an informational write-up about the game Fire Emblem: Three Houses (e.g., overview, features, platforms, gameplay, release) — or are you asking for instructions or information about obtaining an NSP file (Nintendo Switch ROM) from 1fichier or similar file-hosting sites?
Ensure your Nintendo Switch is set up with the necessary homebrew software, such as the Homebrew Menu. fire emblem three houses nsp 1fichier id better
If it's the former, I’ll draft a neutral, informative summary. If it's the latter, I can't help with locating or distributing copyrighted game files or facilitating piracy, but I can provide legal alternatives (where to buy, how to patch/backup legally, preservation resources). Which would you like? I can help, but I need to confirm