The filename "1C1152FD-E71B-4D2A-94C8-9E70E44F551A.jpeg" appears to be a unique identifier (UUID) typically generated by when a photo is captured or exported from the Apple Photos library .
: Because it uses a 128-bit UUID, the filename is globally unique, preventing overwriting when merging folders from different devices. 1C1152FD-E71B-4D2A-94C8-9E70E44F551A.jpeg
: While the name is a complex string, the .jpeg (or .jpg ) extension ensures it remains a standard compressed image compatible with almost all web and desktop viewers. The filename "1C1152FD-E71B-4D2A-94C8-9E70E44F551A