Saving and sharing an existing document to OneDrive means that you will send a document (for storage and for sharing with others) to a centralized secure location on the web. With OneDrive, each person is able to contribute by editing or viewing the actual file using Office web applications within the web browser, or locally through desktop versions of the applications. For example, if there is an important presentation with a client and suddenly your laptop stops working, then having important documents stored in OneDrive would help.
You do not need to bother with flash keys or multiple copies of documents. OneDrive is accessible by means of a Microsoft account such as Outlook, Hotmail, Live, Xbox, or Skype.
