We may Use Disk Management to maximize C-drive capacity. So, we can produce unallocated space first and make sure it is placed right behind the partition of the device. Then, with the unallocated space, expand the C drive. We can either shrink any of the other partitions or remove existing partitions to Generate unallocated space.

Step 1 – Go to the Control panel

Step 2 – Select System and security Option

Step 3 – Go to administrative Tools Option

Step 4 – Click On the Computer Management then Click On Disk Management

Step 5 – Right-click on the Disk D Primary Partition 

Step 6 – Click On Delete Volume —> Click on Yes

Step 7 – Right-click on the Disk C

Step 8 – Click On Extend Volume.

Step 9- Click Next to continue —> Click On Finish.

Drive C space has been increased.