If someone sends you a mail message with an attached file, the line “Parts/attachments” will appear in the mail header. To save an attachment:
Read the message as usual.
See Reading your mail, above.
Then use the cursor keys to move the highlighted line to the attachment you want to save.
S to save the
Pine will prompt you with the message “Copy attachment to file in home directory:”. Type a file name and the attachment will be saved in a file by that name.