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
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.
Dropbox Enables Photo and Video Uploads