Dropbox allows users to create their own folder, which is then synchronized so that it appears as the same folder regardless of which device is used to view it. Files placed in this folder are also accessible via the Dropbox website and mobile apps.
In order to share a file, the user can generate a URL for it from the Dropbox website and send it out for others to view.
The service provides 2GB of storage within the free account users are offered and up to 100GB on paid subscription accounts.
Arash Ferdowsi and Drew Houston