Files named ssv1 are frequently community-shared "Super Save" files. These usually contain unlocked items or specific progress. Once extracted, you typically place the .sav file inside your game's Save folder (usually located in %AppData%\Local\VotV\Saved\SaveGames ).
Go back to where you downloaded it. Multi-part archives require you to have every part in the same folder before you right-click the first one and select "Extract." ssv1.rar
The official tool for .rar files, available at rarlab.com . 2. Is a "Piece" Missing? ssv1.rar