In the context of WinRAR and multi-part archives like your file, a solid feature (Solid Archive) is a special compression method where all files in the archive are treated as one continuous data stream. What it means for your file
Ensure you have all parts (part01, part02, etc.) in the same folder.
Are you seeing an during extraction, or were you just checking if the file is safe to open?
You must right-click on ICARUS.v1.2.23.103516.part01.rar and select "Extract Here" . WinRAR will automatically pull the data from part03 when it needs it.
By treating files as a single block, WinRAR can find patterns across multiple files, significantly reducing the total size. This is common for game repackages (like Icarus ) that contain many similar small files.
Updating or modifying a solid archive is slower because the software has to re-analyze the entire data block.
In a multi-part set (like .part03.rar ), if one part is corrupted, it is much harder to recover data from the subsequent parts compared to a non-solid archive. How to handle it
Because the data is linked, you cannot easily extract a single file from the middle of the archive without WinRAR processing everything before it.