Save files that haven't been edited

Capability to save a file opened in CloudOn from a different app to your synced services. For example, if I am emailed a PDF and select "open in" from my iPad, it will open in CloudOn, but there is no way to save it to my Google Drive. If a file is edited, then it will automatically save to my Google Drive uploads file (or whatever the corresponding thing is for Dropbox etc.), but sometimes I can't edit (like PDFs) or don't want to edit.