Attachment
Attaching
noun, verbal noun, の adjective
Append and attach this document to your email. That’s called attachment.
添付 refers to the act of attaching something supplementary to another document, like attaching a file to an email or attaching a map to an invitation.
The reading for 添 is what you'd expect. The reading for 付 is the on'yomi reading ふ, which you've learned with 付近. But for this word it becomes ぷ from the rendaku fairies. Just think of an attachment where instead of a document or something, you get an attachment of poop (ぷ). What a gross attachment. Your friend who likes to send poop attachments is dumb.
コウイチの予定につきましては、添付のスケジュールをご確認ください。
As for Koichi's plans, please check the attached schedule.
WaniKaniのメールには、よく面白いGIFが添付されています。
WaniKani emails often have funny GIFs attached.
グリーンカード申請に必要な添付書類のリストはどこにありますか。
Where is the list of the necessary attached documents for a green card application?
人事部長様、 恐れ入りますが、このEメールに添付された履歴書にお目通し頂けますでしょうか。お忙しいとは存じますが、よろしくお願い申し上げます。
Dear hiring manager, please have a look at the resume attached to this email. Thank you for your time.