Important: Deleting a partition will lead to data loss, you should back up files in advance. Here’s how to delete and expand a partition: Supposing that there is C, D, and E on your primary hard disk, to extend D drive, you need to delete E drive first. If there is no unallocated space next to the partition, you have to delete the adjacent partition to make unallocated space. In this case, the “ Extend Volume” option is greyed out. Note that, if there is no free unallocated space near the partition, then you cannot enlarge it. Don’t Worry Extending a volume is just as easy as shrinking one.
Run out of space on one of your Windows partitions or If you have some free space on one of your drives and the partitions on it are too small, you might want to resize them to make them larger.
