>>https://help.dropbox.com/files-folders/share/share-outside-dropbox
>
>This is what I did when trying to share the file via dropbox. But he said (via email) he could not get the files. It could be that dropbox asks to log in with either dropbox, facebook, or google account. And I suppose he has none of these. Plus he does not understand English well; neither tech talk. I think I will ask him if it is ok to give his email to WeTransfer site and do it that way.

When doing my class reunions and other similar events, I'm the photographer, and I usually put up the photos in a folder on dropbox, click share on that folder, copy the link and then paste it in an email that I send to everybody. They just click it and get to see the pictures. And, mind you, most of them are not IT (just 2 or 3 of them, fellow mathematicians :), and are just as old as I, i.e. semiliterate in IT matters.

Now your guy may not be semiliterate.