You can download the app directly no your device through the BlackBerry App World or by using the link which follows:
DropBox is available on almost all platforms, so you can share you files no matter what smartphone, tablet or computer you have.
- Browse the files in your computer's Dropbox folder easily.
- Open images and other media directly through the app.
- Upload photos to all of your computers at once.
- Share links to your files over email.
- Search through your Dropbox instantly.
- Export files to other apps.
Dropbox for BlackBerry requires a free Dropbox account. Get a free 2GB account when you sign up through the Dropbox for BlackBerry app or at http://www.dropbox.com.