If you are trying to a similar multi-part file, you can do so in the 7-Zip "Add to Archive" menu by specifying a size in the "Split to volumes, bytes" field.
: The software will automatically detect and link the other parts, including .004 , to reconstruct the original full-size file. Why You Can't Open It Directly Third.7z.004
Are you missing the of this archive, or do you need help installing 7-Zip to open them? If you are trying to a similar multi-part
: Ensure every numbered part of the "Third" archive is present in one directory. : Ensure every numbered part of the "Third"
How To Download and Install 7-Zip On Windows 10/11 - (Tutorial)
The file extension .004 indicates that this file is the . Because it is only a segment of a larger whole, you cannot "develop" or open it as a standalone text file until the entire archive is reassembled. How to Reassemble the Archive
: Use a program like 7-Zip or WinZip to open only the .001 file.