Elias knew exactly what it was. The .001 extension meant this was only the first chapter of a multi-part compressed 7-Zip archive. Without the remaining files ( .002 , .003 , etc.), the data was an unreadable brick. Yet, this single file alone was a massive 50 gigabytes.
Elias right-clicked the file. He knew he couldn't extract it, but he used a hex editor to peek at the raw, binary code at the very beginning of the file. CMFV.7z.001
A text prompt appeared on the screen, typing itself out line by line: Incomplete archive detected. Elias knew exactly what it was