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: