Dropbox is offering extra 5 GB of free storage space to test automatic uploading of photos and videos feature of Dropbox beta version 1.3.13. This is on top of the 2 GB space that comes with a free Dropbox account. For every 500MB of photos and videos automatically uploaded, you'll receive another 500MB space bonus, up to 4.5GB total. You will get the first 500MB space for the first photo import.
Download Dropbox beta
Note: If you are using Dropbox beta on Windows then connect your phone (make sure Windows AutoPlay feature is on) and select "Import picture and videos.")
Go to http://dropbox.com/free for more Dropbox space.