To see the contents of the guide, you will need a program that supports the 7z format:
Files with numeric names like this are often associated with: 525252528.7z
Run the file through an antivirus or VirusTotal before extracting. To see the contents of the guide, you
Since the file name is generic and numeric, before opening: 525252528.7z
Knowing the website or the topic (e.g., gaming, programming, or archiving) would help me identify exactly what "guide" it contains.
The original tool for this format. It is free and open-source. Keka (Mac): A popular choice for macOS users.