This file name refers to a digital update for a Nintendo Switch game, likely distributed via community repositories. Specifically, is shorthand for Nintendo Switch, "NSP" is the official file format for digital software (Nintendo Submission Package), and "Update 640" indicates this is a version patch rather than the base game.
This is a compressed archive. It must be extracted using software like WinRAR or 7-Zip to reveal the .nsp file inside. NES-NSO-(USA)-NSwTcH-NSP-Update640-Ziperto.rar
"Update 640" corresponds to a specific version of the NES app. These updates typically add new classic titles to the library (like EarthBound Beginnings or Dig Dug ) or improve emulation accuracy and netplay stability for multiplayer sessions. This file name refers to a digital update
