To use this file, it must be part of a set (e.g., part1, part2, etc.) downloaded from Ziperto. How to Handle Multipart .rar Files

This often means one of the parts was not downloaded completely.

Nintendo switch game has multiple NSP files : r/SwitchPirates

If the extraction fails, part2.rar might be corrupted. Try downloading it again.

Transfer this single .nsp file to your Nintendo Switch using tools like DBI or Tinfoil to install it. Potential Issues