If you receive an error, it is likely that one of the volumes is corrupted or missing.
Even though you need the third part, initiate the extraction process by opening the first file ( ... .7z.001 ) with 7-Zip . K0KOUVCAMGCSAA9.7z.003
Right-click the .001 file, select '7-Zip', and choose 'Extract Here' or 'Extract files'. If you receive an error, it is likely