It is often seen in old forum posts (dating back to 2008) where users uploaded photos of hobbies, such as marine aquariums or reef tanks .
It appears in file lists for adult-oriented image sets or torrents where the original camera filenames were preserved. SNC17635.jpg
Right-click the file, go to Properties (Windows) or Get Info (Mac), and look at "Details." This will often tell you the exact camera model used and the date the photo was taken. It is often seen in old forum posts
Many people have this file in their personal Google Photos or hard drive backups simply because their camera reached that number in its sequence. How to identify your specific file: Many people have this file in their personal
Because "SNC" is a standard prefix for Sony camera images (followed by a 5-digit sequence), this specific filename appears in various unrelated contexts across the web: