A primary feature of extracting multipart .rar files on Windows 10/11 is . When you begin extracting Part 1 , your extraction software (such as WinRAR or 7-Zip) automatically recognizes the other parts in the sequence and pulls the data from them to reconstruct the original single file. To use this feature:

The software will automatically read part 3 during the process without further input from you.

Right-click only on the .part1 file (or .exe if it is a self-extracting archive) and select "Extract Here".