I Need Someone To Teach Me How To Highly Compress A File

I Need Someone To Teach Me How To Highly Compress A File

I Need Someone To Teach Me How To Highly Compress A File
My Laptop Confergation
Ram : 4GB
Processsor : INTEL(R) Core(TM) i3-2310M
CPU @ 2.10GHz
HardDisk: 500GB

But The Hardisk Is Almost Full.... I Have Heard That By Highly Compessing The File The Size Becomes To Small
So I Searched In Google And YouTube And Tried It... But I Failed
So I Need Someone To Teach Me How To Highly Compress A File
It Should Be Atlest 40-50% Smaller
If I Need Any Software So You Have To Provide Me And Also The Tutorial

---

Requirements

I Need Someone To Teach Me How To Highly Compress A File

---

Skills Required

Highcompressio Compress