Smugmug is a paid photo sharing website which allows you to backup photos & videos, also organize, edit and share them to social networking sites. SmugMug has an integrated download tool which allows you to save a .zip file of all your galleries. And, it allows you to download original and high resolution copies of your photos. when you click 'Download All' option, Smugmug will create a .zip archive of your photo gallery. Once the .zip archive is created, you will get an email with a link from Smugmug. If you have make changes to the gallery since this download is generated, you can click the "Regenerate" button to generate a fresh download.
You can now install PicBackMan's SmugMug uploader for Mac from the website and start backing up SmugMug Photos & videos.