Using a Hex Editor , you can look at the first few bytes of the file. If it starts with 7z , it is a valid archive; the subsequent bytes might reveal the original filenames or software that created it.
You can use ExifTool or the FileInfo Class to check when and how the file was created. 029314a66a124a55b616357dd2e7de5516546023.7z
Many modern games use hashes to name their internal data packs to prevent file conflicts. Using a Hex Editor , you can look
This 40-character string is a SHA-1 hash . These are commonly used by version control systems (like GitHub ) or content-delivery networks to uniquely identify a specific version of a file or data set. Using a Hex Editor