Saving a document, GroupDocs.Redaction puts it in the same folder as the original file, renaming or rewriting original. If you need to save the document to any custom location, you’ll have to open a Stream to this location. As a save option by default, GroupDocs.Redaction converts all pages (slides, worksheets) in a document into images and puts them in a single PDF file, so you can share the redacted document without any additional conversions. You can control this behavior through RasterizeToPdf property in SaveOptions or Enabled property in RasterizationOptions class.
You can see examples of Save method and its options in one of these guides: