An email attachment is a computer file sent within an email message.
An email attachment can be of many different types such as:
Open a new email message window (Click the "New Message" or "Compose Email" icon, or use the keyboard shortcut of CTRL + N)
Click on the paperclip icon titled "Attach a File/Files"
Browse through your computer's folders and click to select the targeted files/folders. You can select multiple files at once.
Click the "Open" or "Choose File" icon to attach the file to your email.
On your computer, go to your email.
Open an email message.
Hover your mouse over the attachment's thumbnail, then click Download.
Make sure you've downloaded the mail app.
On your smart phone, open the app.
Open the email message.
Tap the attachment to open it.
Tap the attachment again.
In the top right, tap "Share".
Tap "Save Image".
Open the email message that you want to forward.
Click on the "Forward" icon
You will see a box saying "Do you want to include attachments?"