Affinity Photo document
AFPHOTO is the project file of Affinity Photo, Serif's photo editor. It holds the pixel layers, masks, adjustment layers, filters and history settings of an edit so it can be reopened exactly as left. ToAny reads the preview picture Affinity saves inside the file, so what you get is Affinity's own render of the document, at the size Affinity stored it (up to about 512 pixels on the long side), not the layers or the full-size artwork.
Opens in Affinity Photo and Affinity 3; some other editors can import it
AFPHOTO converter