1. Go to the album. 2. Double click on the image you want to download and the hover over the image and a "MENU" option will appear in the top left corner. 3. Click on DOWNLOAD option and then select "Original" and it will download the full, high resolution image right to your downloads folder on the computer.
FROM A PHONE: 1. Go to the album. 2. Click on the image you want to download and then click the download icon in the bottom right corner. 3. This will bring up the full sized image.
On a iPhone: If you click the center icon on the bottom row of the screen, this will bring up your options and select where you want the image saved.