The Canon My Image Garden software is a viewer for the files stored on the hard driver. By default, you use the tree menu on the left to browse through folders. If you want to delete an image, simply delete it from your computer using My Computer and then browsing to its location. To decrease the resolution and file size for your scans, simply lower the scanning DPI. By default it should be somewhere around 600 or 300. Just lower it to 72 or keep it something around 200.