The built-in "Photos" application allows you to place several photos on a common file cabinet. Just use the "Share" button, select some photos and click "Copy".
A common cardboard will have each photo as an element with two views: "public.jpeg" and "public.utf8-plain-text". The second view (text) is apparently the file name, however, in this case, the photos always return the “image” plus a sequential number (that is, image1.jpg, image2.jpg, etc.).
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