The suffix .part31.rar indicates this is the 31st piece. To extract the original content, you must have all previous parts (1–30) and any subsequent parts in the same directory.
A 31-part archive of 2GB each would total over 60GB, consistent with modern "mega-packs" containing high-definition textures, physics models, and sound files for sim racing. 2. Specialized Software and Firmware GT1.63_2GB.part31.rar
High-fidelity car packs (v1.63) or track updates are often distributed in large, split RAR files. The suffix
Ensure you have part01 through the final part. GT1.63_2GB.part31.rar