The .7z extension indicates it was created with 7-Zip, an open-source tool known for high compression ratios. Possible Content
Right-click the .001 file using a tool like 7-Zip or WinRAR . SS-Vio-015_s.7z.002
Ensure you have SS-Vio-015_s.7z.001 and SS-Vio-015_s.7z.002 in the same directory. SS-Vio-015_s.7z.002