Anything at all — a letter, a flyer, photos, an agenda. You don't need an account and there's nothing to sign into. It goes straight to Brad.
You can pick more than one. Photos, Word documents, PDFs — all fine.
Writing in Notepad? Don't bother saving a file. Select it all, copy, and paste it below — or just type straight into the box.
Either way — a file, typed text, or both. You'll see a green check when it lands.