: The "14.9M" in the filename typically refers to the 14.9 million user records that were compromised during the breach.

: 500px discovered the security issue in early 2019, though the actual unauthorized access happened in July 2018 .

: This adds a crucial second layer of security to your accounts.

The file is likely associated with a significant data breach involving the photography platform 500px , which occurred in mid-2018.