Architecture concept
Instead of just saving photos and videos itself, nowadays people care about enhanced information. So every item contains one or multiple references.
This could be the RAW and a JPG from your mobile phone, or the mosaic of photos when generating a stiched panorama. Even modern image processing applications do not touch the original photo, all editings are stored in an XMP File (Extensible Metadata Platform file).
With this concept, users are able to display and download specific references from their saved items.