: An .nsp file for Blaster Master Zero (or its sequel) at version 1.2.
: Downloading ROMs or NSP files for games you do not own is a violation of copyright law. Furthermore, using NSP files on an online-connected Switch carries a high risk of a permanent console ban from Nintendo services.
: This is the "scene" tag or the name of the website/group that uploaded or curated the file. What is likely inside?
: You will need a program like WinRAR or 7-Zip to extract the .nsp file from the .rar archive.