Dropbox allows you to share a link to a photo/video file or folder. You can also share a link to photos with other people via email. If you want to share a link to a file or folder, then open 'Dropbox' app on your iPad and swipe from left to right over the file or folder to see a set of icon. Tap 'Share' icon and select an 'email' option. Fill out information as needed to send the link. You have another option to share photos with others i.e. 'Share a link to photos'.