If you want to upload a large number of photos, then you can use "Dropbox Desktop Application" on your computer to upload photos. It may be faster to upload them to your Dropbox account using your computer than the phone. To upload photos from your phone to Dropbox using your computer, then download and install "Dropbox Desktop Application" on your computer. Now sign into your account using the desktop application and plug your phone into your computer. Once you phone plugged into your computer, Dropbox Desktop Application will ask if you would like to upload photos from your phone. When you choose 'Yes', Dropbox will copy the photos from your phone to the computer and quickly upload them to your Dropbox account.