The goal is to allow family members to upload their photos and video of family events.
But each member would have a username and password and only access to their files until I moved them to a shared folder.
I would also like to customize the login screen.
http://www.sharefile.com/
So they login using their email address as the username, and a password I provide them.

Then the next screen has a simple button to upload their files.

Anything like that exist for free ?
Is it somewhat secure?