: Files like these are stored in dedicated folders on your device, such as Telegram/Telegram Video or Telegram Documents , depending on what the identifier actually represents. Definition of file name - PCMag

: When you download media from Telegram, the app often renames the file into this format. The first digit (in this case, "4") typically refers to a specific category or server location, while the long sequence following the underscore is a unique identifier for that specific piece of media.

: Unlike a file named "Vacation_Photo.jpg," this numeric string is created automatically by a developer's program to ensure it remains unique across millions of other files.

The identifier is a characteristic example of a non-descriptive filename commonly generated by messaging platforms like Telegram . While it may look like a random jumble of numbers, it actually functions as a unique digital fingerprint used to manage and retrieve data within a massive cloud-based system. The Anatomy of the Number