How To: Compress 3GB file to 3MB?

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The most common problem that gamerz face is that they couldn't transfer large games into their pendrive.KGB archiver has a perfect solution for this. KGB has the highest compression rate that has abitity to convert 3GB files to 3MB! But it also has drawbacks like,
Takes hours or even days to complete archiving! And KGB archiver is needed to extract compressed files...
Other than this, KGB Archiver is the best archiver with best best compression rate...