Its better to use a software named Ease US partition master for you to do safely and easyġ.Open EaseUS partition manager and select the drive you want to shrink(D) and click resizeĢ.Since you want to increase size of partition before it C increase the 'Unallocated before' to your specified size by sliding the 1st end and click on Okģ.Then click on execute operation at top after that a reboot may be requiredĤ. A Microsoft Reserved Partition (MSR) is a partition of a data storage device, which is created to reserve a portion of disk space for possible subsequent. To extend C drive partition you have to do simple steps
To extend partition there must be free unallocated space just next or before to it.You have free unallocated space next to E(Windows Apps)but not near C Disk Management tool windows cant allocate partition before drive it can free partition only after drive so you cant extend partition by disk management without deleting partitions but this solutions software helps to extend without format and more convenient