In BigTree 4.3, a whole new file manager was introduced with a dedicated Files tab. Along with this update, resource metadata was also added. This can be managed through the Developer section under "File Metadata". Metadata allows you to add specific fields to Video, Image, and regular File type resources to allow users to associate extra fields with these entries. You can then use Image Reference, Video Reference, and File Reference field types to allow front end users to associate a field in a Template, Callout, Module, or Setting with one of the uploaded resources in the file manager. Using BigTreeCMS::getResource you can then grab a resource from the file manager along with its associated metadata for display in your templates and callouts.