If you attach the file to your Gmail message using Google Drive instead of as a traditional attachment, you can "send" files of up to 10 GB. (You're not really sending a file but rather a link.)
From Google Support:
- Hover over the plus icon at the bottom of the compose window, which will open the insert menu. (Remember, you need to be using Gmail's new compose and reply experience to insert files using Google Drive).
- Click the Google Drive icon
. In the window that appears, you can upload a file to Google Drive, as well as navigate to or search for files you've stored in Drive. For files stored in Drive, select the checkboxes next to the files you want to insert. If you don't have any files in Drive, visit drive.google.com to either create, sync, or upload them.
- Click the Insert button.
Gmail then adds a link to your message so recipients can click the link to view your file.
When you send the message, Gmail checks to see if your recipients have access to the file and will prompt you to adjust the sharing settings on the file(s) you've inserted, if needed.