Task: I'd want to send the "Essay Business" file to Marco Rossi at marco.rossi@rossoday.com so she can review it's contents.
Steps:
Click on the three dots icon next to the second file
Click on the share option
Click on the gmail option
Click on the from email id
Click on the Jane email id
Enter the "to" email id as  marco.rossi@rossoday.com
Click on the send icon at the top of the screen