You may send single files or compress multiple files into one Zip (Windows) or StuffIt (Mac) file. Fill out your information and a brief description of the sending file. Press the "Choose File" button and select your compressed file. Once file is selected, press the "Upload" button only once. You will know your upload was successful when you see the progress bar with a return back to this page. Upload time depends on the size of your file and connectivity speed.