Based on the naming convention, here are the key details regarding this "piece":
: The date 30.03.2022 indicates this archive contains a version of the game updated as of March 30, 2022. This version typically includes early DLCs and performance patches released after the game's initial launch.
If you are missing other parts or the extraction fails with a "Checksum Error," it usually means this specific "piece" (part03) was corrupted during download and needs to be re-downloaded. Are you having trouble extracting this specific part, or