To access the data within this file, you must treat it as part of a set rather than a standalone file.

The file is the third segment of a split RAR archive. Multi-part archives like this are commonly used to divide large files (such as high-definition videos, software installers, or disk images) into smaller pieces for easier sharing or storage. Core Functionality & Extraction

: All segments (part01, part02, part03, etc.) must be in the same folder for software like WinRAR or 7-Zip to successfully reassemble the original 5GB file.

Extracting part.rar files without previous volumes - TechRepublic