The filename you provided refers to a specific file package for the Nintendo Switch version of the Pokémon HOME application.
.rar: This is a file extension for a type of compressed file. RAR files are used to bundle and compress files, making them easier to transfer or share. Pokemon HOME -NSP--Update 3.2.1-.rar
Indigo Disk Compatibility: The update enabled full connectivity with The Hidden Treasure of Area Zero Part 2: The Indigo Disk DLC for Pokémon Scarlet and Pokémon Violet. The filename you provided refers to a specific
found on third-party hosting sites are not official Nintendo distribution methods. Security Risk Pokemon HOME -NSP--Update 3.2.1-.rar