.7z represents an archive created with 7-Zip , known for its high compression ratio.
Are you trying to a specific set of files, or are you investigating an unknown file found on your system? X-WORLD Pro Test - simHeaven 008.7z
Based on technical databases and community forums, this specific naming convention is frequently found in: To verify it safely: If it's in a
If you found this file on your computer and don't recognize it, it is likely a leftover from a large software or mod installation. To verify it safely: 008.7z
If it's in a folder related to a game or a mapping tool, it is likely legitimate.
Look for a .001.7z file in the same directory; the metadata in that first file will usually reveal what the overall archive contains.