The disk management tool that comes with Windows system does not have the function of adjusting the size of hard disk partition. In order to adjust the partition size without losing the original data on the partition, third-party partition software is needed.
Commonly used partition software supporting lossless partition adjustment includes partition assistant, Acronis Disk Director Suite, Diskgenius, etc.
It should be noted that partition adjustment is a risky operation, and important data must be backed up before actual operation!