: You cannot open this file by itself. You must have all other parts of the set (e.g., (4).7z.001 and (4).7z.002 ) in the same folder.
The filename typically indicates the third part of a split 7-Zip compressed archive . (4).7z.003
: Use 7-Zip (Windows) or Keka (macOS) to handle these file types. : You cannot open this file by itself