The filename "FIREMBENGAG-(USA)-NSwTcH-[BASE]-XCI-Ziperto.part" represents a partitioned, pirated XCI file for the Nintendo Switch game Fire Emblem Engage sourced from a third-party website, with the "BASE" tag indicating it is the initial release rather than a full update. This XCI file format is designed to be a digital dump of an original game cartridge, which requires homebrew firmware like Atmosphere and installers like DBI or Tinfoil for use on a console, as well as being compatible with emulators.
Switch Tutorials #2 Installing Games (.XCI .NSP) Game Card Backups FIREMBENGAG-(USA)-NSwTcH-[BASE]-XCI-Ziperto.par...