The .part01.rar extension indicates that the full game or update was split into multiple smaller pieces (e.g., part01, part02, etc.) to make downloading or sharing large file sizes easier. To use it, you generally need all parts in the same folder before extracting them with a tool like WinRAR or 7-Zip .
The file refers to the first segment of a multi-part compressed archive containing Age of Empires IV . This specific version, v5.1.148.0 , corresponds to a minor patch released by World's Edge and Relic Entertainment on December 1, 2022 . Context of the File Age of Empires IV v5.1.148.0.part01.rar
This patch was the first minor update following the game's major Anniversary Edition update. It introduced balance changes for the Malians and Ottomans, UI improvements like updated unit health bars, and stability fixes. This specific version, v5