Dropbox updated its software to allow automatic uploading of photos and videos when you plug in a camera or smartphone via USB or insert a memory card into a USB reader on a computer with Dropbox installed. Adam Engst explained the features in depth last month. Dropbox increases free accounts from 2 GB to as much as 5 GB as you upload photos and videos. Version 1.4 is automatically installed on your computer to enable this feature. follow link
Find Photos in iPhoto in the Finder
Looking for the file associated with a photo in iPhoto? In iPhoto, to view a photo's file in the Finder, Control-click it and choose Show File from the contextual menu that appears. You can then drag the file's icon into an Open dialog to upload it to a photo-sharing service, for instance, but whatever you do, don't move or rename that file!
Dropbox Enables Photo and Video Uploads