What we need to know is how to safely resize partitions. Of course, there are many other reasons why we should resize the partition, but this is not what we should care about in this article. Therefore, we must expand the C drive to make our PC run better. Or over time, the storage space on the system C drive may no longer be enough, deteriorating the performance of our PC. In this case, we must manually compress it to create unallocated space and create another partition with unallocated space. For example, when we buy a new PC, there is usually only one partition on the disk. For computer users like us, sometimes we need to change the size of some partitions for different purposes.