These files are often associated with file-hosting services (like Mega, MediaFire, or Rapidgator) and are commonly found in specialized communities sharing large software packages, scene releases, or ROM collections. To help you resolve this, could you tell me: Where did you download this from? Do you have all the other parts (.part1, .part2, etc.)?
Many files of this type are password-protected, requiring you to have the password used during the original compression. 62L47H75F7N8R75G84848939.part3.rar
A .part3.rar file cannot be opened or extracted on its own. You must have part1 , part2 , part4 , etc., located in the same folder to reconstruct the original, complete file. These files are often associated with file-hosting services