To download a attachment follow this:
Save files sent to you by others to your computer.
Open a message containing an attachment.
Click Download attachment in the message.
Select where you would like the attachment to be saved on your computer.
To attach a attachment follow this:
Click the Attach Files icon .
Your computer's file selection window opens.
Locate the file(s) you want to attach and click Open (or your computer's equivalent.)
Your attached file(s) will appear below the message body.
Compose your email and click Send.