Help with sending one persons file/photo to another user's account

Okay, so I want to figure out how to do this. I have a website where a user has a page of photos. But I want to include a way for this user to send a link to his friend that allows that friend to upload a file/photo. and then that file/photo appears in the user’s website page. how would I store the data to do that to where it knows what user’s page to send the data too, so it doesn’t send to the wrong user but sends to the user that sent the link?

Okay assuming both are registered users, one out of many ways you can do that is ;

Easiest, my opinion, will be
Have a specific page that does that with the file uploader element and a button to trigger the upload…

The friend obviously will be amongst list of user allowed to perform that in the Primary user’s account, talking abou privacy rule

So the link of that particular page u’ll be sending should carry the Unique ID of the sender so that you can reference it in the workflow while uploading the file…

Yeah this is the summary!