Uploading (opposite to downloading) is sending files from your computer over the internet. Our system then coverts them to PDF format for you to approve. When you download the PDFs for approval, you should 'open from current location' rather than 'save to disk' (unless you want to save the screen-resolution PDF files for your own use). This will open the PDF in a new browser window while you are on-line. The speed of this action depends on your internet connection speed more than your computer's processor speed.