Sending large files (attachments) with Google Drive
Click to download a .pdf of the help file
If you try to e-mail an attachment larger than 25mb, you will receive the message below. Click Send using Google Drive.
Click Select files from your computer.
Select the file you want to send, then click Upload (this may take a while for large files).
Click send when the upload is complete and the file name is displayed in your email.