Mvv.7z !!exclusive!!

: Created by Igor Pavlov in 1999, the .7z format uses high-ratio LZMA and LZMA2 compression. It is known for outperforming standard ZIP files by 30–70% in data reduction.

stands for "Modular Virtual Vehicle" — it appears to be a community-made asset pack for a popular open-world driving simulator (likely BeamNG.drive or Rigs of Rods ). MVV.7z