: Use a tool like 7-Zip or WinRAR and attempt to open only the .001 file. The software will automatically detect and link the subsequent parts (like your .002 file) to reconstruct the full archive.
The ".002" extension specifically identifies this as the of the series. To properly "generate" the contents or extract the data, you generally cannot use this file in isolation. How to Process Split Archives SS-Oli-010_s.7z.002
: If you only have the .002 file, you will receive an "Unexpected end of archive" or "Can not open file as archive" error, as the header information required to read the data is stored in the .001 file. : Use a tool like 7-Zip or WinRAR