Box is similar to Dropbox or 
Google Drive in that it is a cloud-based content management application that syncs with your desktop. It provides 10GB plus syncing capabilities with its free profile. Box can be accessed by any mobile devises such as iPad, iPhone, Android and tablets. It also has a very nice document preview capability without opening the document. Users can add comments and view versions with documents with a paid subscription to the app.
The advantage of Box over DropBox is that it allows online editing of documents and has 8 GB more space with a free account.