How to compress big files.

phil28

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Jun 1, 2014
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I have created a backup of my internal storage on my external one which has 1TB and the backup is just over 900gigs. I want to compress the files but all i can manage with 7zip, winrar, etc is just like 15gigs less. what can i do to properly store it? i also have game install files which is also taking up a lot of storage does anyone know how to sue these software properly or do i just have to bite the bullet and get a new hd? which i am really trying to avoid.