If you receive an email with an attachment you will see the paperclip icon displayed within the list of emails
Click Mail in the navigation bar at the top right of the screen
Click on the email with the attachment you want to download
Click on the attachment file name or click Open in browser to get a quick snap shot of the file
In the pop up box, select Open to view the file in the programme it was sent in
To save the file, you should click the down arrow next to Save and select Save As and save in the most appropriate secure storage location according to local organisation policies