Highest compression for files(for web transfer)? - Super User

I have seen some highly compressed files around, such as 700MB of data compressed to around 30-50MB. But how do you get such compressed files? I have tried using software like WinRAR and 7Zip but

Beginner Guide to Website File Optimization

The 5 Best Image Compression Plugins for WordPress (2024)

12 Best Ways to Transfer, Send or Share Large Files: Updated 2024!

12 Best Ways to Transfer, Send or Share Large Files: Updated 2024!

Distributed File Systems Explained, Features and Advantages

Speed up image file transfer by zipping

8 Best Image Compression Tools: Ultimate List

Secure File Transfer Standards: Data Security & Compliance for File Transfers

Python's zipfile: Manipulate Your ZIP Files Efficiently – Real Python