So, how will Gmail do that. I looked in help page for search operators.
- has:attachment » I entered just this operator and searched. all emails with attachment are shown.
- from:david has:attachment » This will show attachments david sent. I entered » from:me has:attachment » These are what I sent.
- Wait, file type I want is mp3. » from:me filename:mp3
Anyway, I know everybody can read help page and do it easily. I just thought what if you didn't notice this functions like me.