samba shares are windows shares, on linux. any os, mobile and desktop, can either access them directly or got a light-weight client for doing so.

you set up one or multiple shares on your server, like one is “family” and other is “steve” and you can define what each user can do to them - just browse, or read, or write to, etc

or if you need just a read-only share, any web server (apache, nginx, etc) can allow access to a folder you shared.