: Right-click on part1 and select "Extract Here." The software will automatically pull data from all other parts (including part3) to create a single usable .nsp file.
: This usually means you have downloaded the same part twice. Your computer automatically appended "(2)" to the filename because a file named "part3.rar" already exists in that folder. Persona 5 (NSP)(US)(Base Game).part3 (2).rar
Do you have (Part 1, Part 2, etc.) downloaded and in the same folder? : Right-click on part1 and select "Extract Here
To extract the game, you cannot use this file alone. You need to follow these steps: Persona 5 (NSP)(US)(Base Game).part3 (2).rar
: This stands for Nintendo Submission Package , a digital installation format for Nintendo Switch games. How to Use It