Primary partition, it is a kind of hard disk drive partition just like extended partition and logical partition. Primary partition is a key partition which stores necessary files and data that needed to boot Operating System. We can't run Operating System without it. Therefore, at least one primary partition in one hard disk and a maximum of four primary partitions.
Following is two situations to resize primary partition:
If you have little computer knowledge when you encounter these problems, you may look for solutions from website or forum. Now you don't need to take much more time to look for answers. This article will let you know how to resize primary partition and solve these problem easily with partition manager software.
As magic hard drive partition manager software, EaseUS Partition Master can extend primary partition or shrink primary partition safely with simple operations by its "Resize/Move partition" feature.

Download and launch EaseUS Partition Master, the only thing you need to do is choose the right parttion you want to resize, and then select "Resize/Move partition" to extend, shrink or move it. Backup important data with reliable backup software before doing changes to partition is recommended.
For detailed steps to resize primary partition, please refer to:
EaseUS Partition Master also provides copy partition, copy disk, copy dynamic volume, convert partition, split partition, merge partitions, convert dynamic disk to basic disk, and partition recovery, etc. to manage your disk partitions more easily and safely.
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