Recently, I receive a Windows pop-up saying that I have only 400MB of free space left on my C drive and I need to free it up. But, this drive has held many important data. I don’t want to free it up and lose part of original data there. So, I just wonder whether I can add some free space to this C drive from other partitions. For example, I have an E partition that has 85GB of free space. Is it possible for me? Help me, please!