You can start sending files via email securely using a Dropbox free trial.
For more information see, Introduction to OneDrive.
Shared network locations Save files in a folder that your recipients can also access. You can then send recipients a message containing a link to the shared location. On the Insert tab, in the Links group, click Hyperlink. If the shared location path or file name contains spaces, see Add links containing spaces to an e-mail message. Photo sharing sites If you are sending pictures to someone, consider resizing those pictures before you send them. See Reduce the size of pictures and attachments. If you receive a ton of large messages, this app will be the perfect tool to locate, organize, and remove them from your inbox to avoid your server from being slowed down. The 'Smart Views' feature automatically sorts through your messages and combines emails larger than 10MB into a separate folder.