How long photographers keep photos varies, so clients should download straight away. For photographers: set the delivery link to expire on a date you choose, and keep your archive somewhere else.
Email, WeTransfer, Google Drive, gallery platforms or an expiring link: the best way to send photos to clients depends on size, how long they need them and what they'll do next. An honest comparison.
Put a wedding photo QR code on every table and guests upload straight to you from their phone's browser. No app, no account, with a password, an expiry date and an upload cap.