This specific string of characters is a . These are often automatically generated by operating systems or applications (like macOS, iOS, or specialized software) to give a file a unique name that won't conflict with others. If this file is on your device, it likely came from:
Could you tell me or what it shows so I can help identify its origin? C8F45A5F-7A30-4906-B502-D36BE92D320F.png
Some software uses these identifiers for internal tracking. This specific string of characters is a
Many apps rename images to UUIDs when saving them to a cache or database. C8F45A5F-7A30-4906-B502-D36BE92D320F.png
Logs or crash reports sometimes capture screenshots with these naming conventions.