Image from: Missed (2013)
Knowing the source can help me give you more specific details about what might be inside.
Files named "WIP" or "Beta" shared on public forums or unofficial sites can sometimes carry risks. If you didn't download this from a source you trust, it is a good idea to scan the folder with antivirus software (like Windows Defender or Malwarebytes) once it is extracted.
If you found this on a forum, cloud drive, or asset site, it likely falls into one of these categories:
A common naming convention for large mods (like for Assetto Corsa , Skyrim , or Minecraft ) that are still in development.
Right-click on part1 and select "Extract Here." The software will automatically pull the data from part 2 and the rest of the volumes to reconstruct the original file. ⚠️ A Note on Safety