: This is the date the file was created or the event took place (July 31, 2017).
: These are the names of the subjects in the file.
The specific file name likely refers to a archived digital record or a photo album from a specific event. 16017 2017-07-31 Alice and Florence 2:2.zip
: This is typically a unique ID number , often used by automated photo systems (like those at tourist attractions, theme parks, or cruise ships) or internal archival databases to catalog a specific session or order.
Based on the components of the filename, here is the most probable breakdown of its meaning: : This is the date the file was
: This often denotes a ratio or a specific count (e.g., 2 out of 2 files or a 2:2 aspect ratio).
The numeric prefix 16017 is sometimes used in court or administrative filing systems to index specific cases or evidence packages. : This is typically a unique ID number
It could be a zip file from a personal cloud service (like Google Photos or Dropbox) where a user manually named a folder for archival.