: Always ensure you are using current signature patches (sigpatches) on your custom firmware; without these, your Switch may display "unable to start software" errors even after a successful installation.

: Ensure all parts (Part 1, Part 2, etc.) are in the same folder.

When downloading larger Nintendo Switch titles like It Takes Two , files are often split into multiple compressed archives (e.g., .part1.rar , .part2.rar ) to comply with file size limits or hosting requirements. 1. Extracting the Multi-Part Archive

: Once extracted, you should have a single .nsp file for Update 1.0.2. 2. Installing the Update

: Open only the first part ( .part1.rar ) using an extraction tool like WinRAR or 7-Zip . The software will automatically detect and pull data from the subsequent parts to generate the complete file.

Guide: Installing It Takes Two (Update 1.0.2) via Multi-Part NSP Files

: Use a title manager such as Tinfoil or DBI to install the NSP directly to your console's NAND or SD card.

An article regarding the extraction and installation of multi-part Nintendo Switch files, specifically for , follows below.