Solid compression is a 7-Zip feature that treats multiple files within the archive as one continuous data stream.

You must have Vi9v.7z.001 , Vi9v.7z.002 , and Vi9v.7z.003 (and any others in the sequence) in the same folder.

The software will automatically pull data from .002 and .003 to rebuild the original files.

Since this is part 3 of a set, you cannot open it by itself. To extract the contents:

Use 7-Zip or WinRAR to open only the .001 file.

When you see a file ending in , it means it is the third piece of a larger split archive. The mention of a "solid feature" (Solid Compression) is a specific method used by 7-Zip to improve the compression ratio. Understanding Solid Compression

It significantly reduces the size of the archive, especially when compressing many similar files.

To extract a single file from the middle of a solid archive (or a later segment like part .003), the software must decode all preceding data in that "solid block." If one part of the archive is corrupted, it often becomes impossible to recover any subsequent files in that block. How to Use This File