: Select "7-Zip" -> "Extract Here" or "Extract to [Folder Name]".
: Ensure you have BVV-1_R.7z.001 , BVV-1_R.7z.002 , etc., in one location. Use 7-Zip : Right-click the first file ( .001 or .7z.001 ). BVV-1_R.7z.7z
Working with Multi-Volume Archives: A Guide to BVV-1_R.7z.7z : Select "7-Zip" -> "Extract Here" or "Extract