That noise you just heard was another shot in the ongoing price- and storage-limit battle between cloud storage and collaboration services. Today, Dropbox upped the limit of its Dropbox Pro service to one terabyte for $9.99 a month or $99 a year. Existing Pro users will see the new limits take effect in the coming days. It also added a few new features, including more detailed controls for sharing files. Anyone you share with can be designated as an owner, editor or viewer of the file. Another new feature is the ability to let shared links expire after a certain amount of time.