: Downloading ROMs or NSP files from the internet is generally illegal. However, you can legally create your own backups (dumping) if you own the original physical or digital game, provided they are for personal use only and not shared with others.
While these files are common in homebrew communities, there are important legal and safety risks to consider: The-Legend-of-Zelda-Breath-of-the-Wild-nsp-roms...
: To install mods on a Switch running Atmosphere, you must place mod files in specific folders within atmosphere/contents/ using the game's Title ID ( 01007EF00011E000 for BotW). : Downloading ROMs or NSP files from the
Content for Breath of the Wild can be enhanced or modified through community-made tools: The-Legend-of-Zelda-Breath-of-the-Wild-nsp-roms...