If you have got photos & videos scattered evreywhere. Dropbox helps you to bring all the photos & videos in your Dropbox account in well organized view. To see it, sign In to your Dropbox website & click 'Photos' located at left side of the window. The 'Photos' page will display every photo & video in your Dropbox account, including shared folders. All your photos & videos are sorted by date. You will see recently uploaded photos & videos at the top. You can quickly navigate to your photos & videos by clicking on the timeline located at the right.
You can install PicBackMan's Dropbox uploader for Mac from the website and start backing up photos and videos.