In this post we will learn about the full partition of C drive. Often times when we want to install a lot of software on our computer or install a large size software. So for this we have to increase the size of C drive. If our computer has two drives. C and D Dive We can easily add size from D to C. Without losing any data. For this we first need to shrink the data from D. We have to write as much size as we need. This method that I am telling you works perfectly.