Move the .nsp file to your Nintendo Switch SD card.
Based on the filename provided, this appears to be a found on Ziperto , a popular website for downloading Switch NSP/XCI files. The file indicates a specific game update ( POKLGEV likely refers to a Pokémon-related title like Pokémon Quest or similar, though often these are placeholder names), designated as a (RF) (Release Fixed or Region Free) UPDATE in .nsp format, compressed into a .rar archive. POKLGEV-(RF)-UPDATE-NSWTCH-NSP-ZIPERTO.rar
Likely short for a game title, potentially PokéLand Legends or a similarly named title, frequently seen in Ziperto's NSP listings. Move the
Means this update will work on a Switch console regardless of its region (e.g., US, Europe, Japan). Likely short for a game title, potentially PokéLand
Used to update a pre-installed base game ( .nsp or .xci ) to a newer version to fix bugs or add content.
Sometimes updates are required to use new DLC content.
Extract the POKLGEV...zip file to get the .nsp update file.