To attach a file to a message you're composing, follow these steps:

1. Click 'Attach a file' under the subject field.
2. Browse through your files and click the name of the file you'd like to attach.
3. Click 'Open.'

If you'd like to remove a file you've attached to a message, click 'remove.'

To attach another file, click 'Attach another file.'

Keep in mind that you can't send executable files or messages larger than 10 MB.