The filename appears to be a compressed archive for a Nintendo Switch game. Breaking it down term-by-term clarifies what it likely contains and the implications around it.
💡 You can purchase and download the legitimate version safely through the Nintendo eShop or find physical copies at retailers like Amazon . Mario Tennis Aces - Nintendo Switch - Amazon.com Mario Tennis Aces -NSP- -juego base- -3-.rar
The filename contains the tag -NSP- . This is the technical heart of the archive. NSP stands for . It is the file format used by the Nintendo Switch eShop for digital downloads. The filename appears to be a compressed archive