I didn’t know about file modal according to user level : it’s perfect as is.
I already try “attached to the post” but I see no attachment at all. “attached to post” means “attached to CPT” or “attached to post id” ? If it’s post id, it’s normal there is nothing in media library when creating a new post.
Ok for pre_save and save with wp_set_object_terms, I will look at this.
Thanks for your help.