Window 7 Partition

Question

Hi,

I wanted to Add the space from G:\ drive to C:\ drive? I have less space in C:\drive.
Is there any way we can transfer the space from G:\ Drive to C:\ Drive without deleting G:\ Drive contents?

I have tried to use some tools but i couldn't find any free tool to do that?
https://www.lifewire.com/free-disk-partition-software-tools-2624950

It would be great if anyone can provide any tool or other way to do it? I know Diskmanagement but it deletes the G:\ drive.