A Nintendo Switch running Atmosphere or a compatible CFW.
By design, these files are encrypted and intended to be installed directly from the official Nintendo eShop onto a legitimate Switch console. Installing an NSP file on a standard console requires and specialized tools, a process that is typically associated with the homebrew community but is also used for piracy. It is important to note that using unofficial NSP files bypasses Nintendo's security and is a violation of the console's terms of service. Players seeking update files should always use the console's built-in update feature or the eShop to avoid legal and security risks.
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These are additional files containing patches. For DOAX3 Scarlet , updates are crucial as they often include stability fixes and compatibility for new DLC swimsuits released by Koei Tecmo.