Dropbox offers a different approach to file sharing, letting you sync files among your Windows, Mac and/or
computers and the Web, where you can share the files with others and monitor their changes. Dropbox creates a folder for automatic syncing on your computer(s). If you change any files in that folder or add any files to it, those changes will sync to other designated dropboxes.
You can create private subfolders that sync among your own computers, as well as shared subfolders that sync to clients, partners, teammates or anyone else you designate.
As with the Box.net app, the Dropbox iPhone app lets you manage your shared Dropbox files from your phone. You can assign files to team members or other collaborators and see when a file has been viewed or updated so you can keep up with what your teammates are doing.
You can also use the app to view files others have shared with you, but you can't directly edit them or upload files of your own, except photos and videos from the Camera Roll. (Later in this story we'll look at some iPhone apps that let you download, edit and upload files to and from your Dropbox account.) An Events view in the app highlights whenever a file has been added or modified.
The Dropbox app is free; Dropbox accounts offer 2GB of free storage, with paid accounts starting at 50GB for $9.99 per month or $99 per year.