Can frontend (registered) users upload image galleries? Frontend registered users are allowed to upload image galleries to their articles (or any other Joomla extension) by using the same process as backend users. When using the editor plugin button, frontend users can upload galleries to an automatically created user gallery folder. This prevents e.g. user "John" from seeing & modifying the galleries upload by user "Jane". Furthermore, they are not allowed to view or modify the image galleries that are uploaded from backend users typically inside the /images folder of a Joomla site. In other words, frontend gallery uploading for registered users is a sandboxed process. They can upload and manage their own galleries only. They cannot manage the galleries created by others. Please note that this "frontend user gallery uploading" feature is different from K2 frontend image gallery uploading (which is already sandboxed as a process too). This feature ONLY applies when using the editor plugin button inside a WYSIWYG editor area to upload a gallery in the frontend.