Mashable reports: [edited]
Google announced Tuesday that it will be integrating Google Drive into Gmail, a move that will make it possible to 'send' files up to 10GB over email.
A new button in the Gmail compose window will give users the ability to attach a file from their Google Drive account rather than attaching the file itself to the message.
Once it’s attached, Gmail will ensure that your recipient has permission to view the file in your Drive account -– or will prompt you to grant that permission –- and then sends the message.
The feature works not only for files you attach to the message, but also for links to items stored in Google Drive you paste into a message.