You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.
Based on the file extension , this is a 7-Zip Compressed Archive file. It acts as a container for one or more files and folders, highly compressed to reduce file size. Key Information About 7z Archives: bgsk.7z
To get you the specific "informative report" you need, could you: and tell me what the filenames are inside? You can use 7-Zip on any computer, including
Typically 30–70% better than standard ZIP formats, often using LZMA or LZMA2 algorithms. often using LZMA or LZMA2 algorithms.