Use a program like WinRAR , 7-Zip , or The Unarchiver . You only need to right-click and "Extract" the first file ( part1.rar ); the software will automatically pull data from part2 and subsequent parts to reconstruct the original content.
If part2 is missing or corrupted, the extraction will fail. If you only have this specific file, you will need to locate the other segments of the archive to view the data inside. Common Contexts ZxZ14534620221121180203.part2.rar
This is a RAR archive , specifically the second part of a split volume. How to use this file Use a program like WinRAR , 7-Zip , or The Unarchiver