noindex (media) attachment pages

Hello peeps,

Can somebody tell me what is the best way to stop (media) attachment pages from indexing? I read excluding the (media) attachment sitemap. Will that alone fix it?

Or should i toggle the ‘Media’ meta robots to noindex also, under titles & meta’s/post type ? Or do i noindex all my actual images also when i do that? I just wanna noindex my (media) attachment pages, not the actual image itself, also for future image uploads.

Thank you so much