The file is the second part of a multi-volume split archive created using 7-Zip . It is not a complete file on its own but a "raw" segment of a larger archive that has been divided into smaller pieces for easier sharing or storage. Understanding Split Archives
When a file is too large for certain storage or transfer methods, users can split it into several volumes. These volumes follow a numerical sequence: OK.7z.002
: The second part, which contains the subsequent bytes of data. The file is the second part of a