Email attachment is a computer file sent within an email message.
An email attachment can be in the type of;
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 saying "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.
On your computer, go to your email.
Open an email message.
Make sure you've downloaded the mail app.
On your smart phone, open the mail.
Open the email message.
Tap the attachment to open it.
Tap the attachment again.
In the top right, tap "Share".
Open the email message that you want to forward.
Click on the "Forward" icon
You will face with a box saying "Do you want to include attachments?"