Right-click the .001 file, select '7-Zip', and choose 'Extract Here' or 'Extract files'.
If you receive an error, it is likely that one of the volumes is corrupted or missing. K0KOUVCAMGCSAA9.7z.003
Note: For the best results, use the official, free, and open-source software to handle these archives. If you'd like, I can: Right-click the
Show you where to safely download the software. Right-click the .001 file