Unlike the standard IMG_XXXX naming convention used by the iPhone camera, these long strings of numbers and letters often appear when:
: Since the filename is a random string, you can't tell what it is without opening it. On an iPhone, you can swipe up on the image in the Photos app to see the file name and metadata.
or cloud services (e.g., Nextcloud, Instagram) that rename files to ensure they are unique in their databases.
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