If you are looking for real content related to an "Ernesto" who writes technical blog posts, you might be thinking of , who has a series titled Cpp for Embedded Systems . His Part 2: Delegates and Signals is a popular technical deep-dive for developers.

In various online communities, such files are sometimes referenced as part of "creepypastas" or ARG (Alternate Reality Game) lore. They are designed to look like a multi-part compressed archive containing something "lost" or disturbing.