Right-click only part1.rar and select "Extract Here" or "Extract to...". The software will automatically combine all parts into one.
Transfer this single .nsp file to your Nintendo Switch using tools like DBI or Tinfoil to install it. Potential Issues POKLEGARC-NSwTcH-[BASE]-NSP-Ziperto.part2.rar
You will get a single .nsp file (e.g., poklegarc.nsp ). Right-click only part1
Based on the filename POKLEGARC-NSwTcH-[BASE]-NSP-Ziperto.part2.rar , this is the second part of a multi-part RAR archive containing a base game NSP file for a Nintendo Switch game (likely Pokémon Legends: Arceus, implied by "POKLEGARC"). implied by "POKLEGARC").