However, file owners have the authority to restrict these actions to protect sensitive information. How to Prevent Viewers from Downloading

By default, a person with access on Google Drive can download, print, and copy the files shared with them . While "Viewer" status prevents someone from editing your original file, Google assumes that if you allow someone to see the content, you also allow them to save a local copy for their own use.

If you want someone to see your file but not save, print, or copy it, you must manually change the file settings.