How to ultra compress large files like games using winrar or any other apps.

[Ramuk003]

How to compress large data files like games to reduce the size. Eg: 10gb to 1 or 2gb. Is there is any command programs or anything to do that?

 

[Solandri]

Most game data files are already compressed.

You'll only get a 10:1 or 5:1 compression ratio on sparse files. i.e. Things like spreadsheets filled with lots of zeroes, or small Word files which have a ton of empty formatting info.

For more typical data, a realistic compression ratio to expect is about 80% the original file size (5:4). Depending on the content you may get as good as 70% or as little as 90%. But around 80% is a good average to expect.

Text files will compress more because they only use about 70-100 possible characters per byte, while a byte is capable of representing 256 different characters. So you can expect to compress them to about 50% to 25% their original file size (2:1 to 4:1)

Compressing an already-compressed file does not work. If the initial compression used a poor algorithm, and you compress that file with a really good algorithm, you may get 98% (50:49). You are actually better off uncompressing the original file and recompressing it using the better algorithm. If the initial compression used a good algorithm, and you try to compress it with a poor algorithm, the file can actually become bigger.

 

[Alabalcho]

If there was a way to "ultra compress" any file, all files would be compressed to one byte