A secondary ID used for internal database mapping or versioning.
Facebook's legacy naming convention for image files, particularly those prior to recent updates, typically consists of three sets of numbers separated by underscores: 13162289_1804076106480282_456559371_n.jpg
If the image was uploaded to a private profile or a closed group, these identification methods will not work. A secondary ID used for internal database mapping
This indicates the image's dimensions or scaling (e.g., "n" for normal, "s" for small, "o" for original). Source Identification Methods particularly those prior to recent updates