Multi-part archives frequently fail if one part is corrupted or from a different version. Always check the file size and MD5 checksum (if provided) to ensure the download is complete.
You will need a tool like 7-Zip or WinRAR to join these parts. Right-click on Part 1 and select "Extract Here"—the software will automatically pull data from Part 4 and the other segments. Why a "Review" is Difficult Download Mini update part4 rar
Without knowing the specific game or software this update is for, a "solid review" is impossible. Common "Mini Updates" often refer to: Multi-part archives frequently fail if one part is