Badge to indicate unopened recieved files
What I think would be helpful (especially if you recieve a LOT of files) is a badge on the apps (PC/Mac/iPhone) to indicate an unopened/unlooked at recieved file.
That way you'd never forget about them (even though having emails is a great idea !)
This was done a while back as part of the new notification features. See https://www.digitalpigeon.com/software-updates/blue-badge-notifications-make-activity-tracking-even-easier/ for more details.