: Indicates this is the core game file, not an update (v.0) or DLC.
: A popular multi-purpose tool that allows you to install NSP files from your SD card or via USB from a PC. ONEMORISLND-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar
: A highly efficient installer often preferred for its "MTP Responder" mode, which lets you drag and drop files directly from your PC to the Switch. : Indicates this is the core game file, not an update (v
The "proper piece" you are looking for—specifically how to use this file—generally involves installing it on a modded console. File Tag Breakdown ONEMORISLND-(USA)-NSwTcH-[BASE]-NSP-Ziperto.rar
: The file format (Nintendo Submission Package), which is the standard format for digital Switch games.