By AOMEI / Last Updated April 6, 2021

Primary partition, namely, primary drive; it is a kind of partition just like extended partition and logical partition. Primary partition is the key which storages necessary files and data that needed to boot operating system. We can't run operating system without it. Therefore, there is at least one primary drive in hard disk and a maximum of four. Each drive has special characteristic, windows built-in disk manager may be unable to handle them, so other software would be essential for managing them more smoothly.

Here, I want to show you a kind of resize partition software to resize primary partition, as also extend,shrink, move operation and etc. It called Partition Assistant with several editions to support primary drive on each kind of systems. After download and run it, you will see: (Attention: if don't want to reboot computer, select Extend Partition, as when use the second, if your drive is working now, the program will prompt reboot computer.)

Extend Partition and Partition Management

If choose the above Extend Partition, read the clue carefully in view.

Select Partition that you want to extend

Next, after click two times "Next", extend C: drive, just drag the direction that arrow shows, never need to move D:, C: drive will get more space from the unallocated space automatically.

Adjust the size of the partition

For more convenient functions, choose the Partition Management.

From the follow view, it shows you which partition is "primary" and how many primary partitions. Image that: you have a C: and D: drive and some unallocated space.

Partition Management

Then, look at the procedures step by step:

1. Extend C: drive: click it, at this time, you need move D: to put unallocated space behind it to make room for extending C:, read the Icons in the view:

Move and Resize Primary Partition

2. Resize primary partition to smaller: Drag the slider to the left, easy to do.

Shrink Partition

Attention: Each step you should click "Apply" in the tool bar to take effect.

Besides resize partition functions, you could extend a partition, create and format partition, wipe hard drive, etc. It's easy to resize primary partition with Partition Assistant.

You can choose Partition Assistant's different version as follows according to your OS version, Windows 8, Windows 7, XP, 2000, Vista or Server 2003, 2008.

purchaseBuy Partition Assistant

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Download Partition Assistant Standard Edition (FREEWARE)