[Deleting invisible data]

Hi everyone,

 

I somehow lost 35 Go of data on one of my hard drives.

I manage to recover them thanks to Recuva. But the recovered data occupy 35 Go, and the "invisible data" occupy the same space. So I "lost" 35 Go of space in the process. 

 

I tried to delete the invisible data with CC Cleaner with no success.

 

I would like to find a way to really delete the 35 invisible Go.

 

I can't really afford to save the data from my disk and then format it.

 

I hope i am making myself clear, please let me know if you have questions.

 

Thanks

 

Mat