If you can tell me this file belongs to, I may be able to help you interpret what kind of data it contains!
If you are on Windows, this is the standard free software to open, extract, or view the contents of .7z files. Use File Roller/Archive Manager: If you are on Linux. Use The Unarchiver: If you are on macOS. SSSav007.7z
Because this is a specific, likely personal or game-related save file, I cannot open it to extract the text inside. To view the contents of this file, you can: If you can tell me this file belongs