g、If your target HDD has extra space, the system will allocate it
to “unallocated” area automatically, please refer to the below
picture.
(Windows system only allows a maximum of four
primary partitions, if the original disc already exist four primary
partitions, then it can not distinguish the extra space but logical
drives can have more than one )
HDD Partition
a、Open Disk management and select the unallocated area