Several ways to add your photos in your gallery:
  - Direct upload inside your web browser is the
  simplest and most immediate way. It depends on your browser capabilities
  and your web server. For a huge quantity of photos or in case you encounter some problem,
  the other methods are just waiting for you!
Go to Direct Upload
  - You can find many applications, for desktop or mobile devices, to add photos in your Piwigo.
Go to applications
  - FTP transfer is the most recommended way to add a
  very large collection of photos with a minimum number of clicks. Follow
  the guide to prepare your photos. The FTP method let you control precisely
  the physical organization of your photos on your server.
Go to FTP