Add an attachment
- On your computer, open Google Calendar.
- Create an event, or open an existing event.
- If you create a new event, click More options.
- At the bottom, in the description box, click Add attachment .
- Choose a file that's already in your Google Drive. ...
- When you finish, click Select or Upload.
How do I automatically share attachments in Google Calendar?
In Google Calendar, select the Settings option in the top-right of the screen. From the drop-down menu, select Labs. A list of Google Labs options will appear. Scroll down to Event Attachments and select Enable in the right side of the box.