Usually, your phone hides this name behind the scenes. However, the generic "FullSizeRender" name often appears when you: Upload edited media to like Google Drive . Transfer files to a non-Apple computer (Windows).

: If you notice this happening to photos, check if you have a "Filter" applied in your camera settings. Setting the filter to "None" can sometimes prevent the renaming behavior.

iOS sending pictures as 'Full Size Render' - Apple Communities

Here is a quick guide to understanding what this file is and how to manage it. What is a "FullSizeRender" File?

: The file named FullSizeRender.mov (or .jpg for photos) is the version containing your edits. Why Does the Name Change?