MBR vs GPT disk

Convert Primary partition to Logical without data loss

Comparing with GPT disk, MBR disk has some limitation and disadvantages, among them all, the most common issue caused by MBR disk limitation is that you can’t create more partitions if you have already created 4 Primary partitions. In that case, you need to change Primary partition to Logical.

To do this, Windows native Disk Management cannot help you, so you need 3rd party safe partition software. This page shows how to convert Primary partition to Logical without losing data. The 1 step solution is valid for Windows 10, 8, 7, Vista, XP and Server 2019, 2016, 2012, 2008, 2003 as well as SBS.

More about Primary & Logical partition

MBR vs GPT disk

Primary Partition can be created on both MBR and GPT style disk, which works like a physical component. Every Primary partition has an entry in the Master Boot Record and there are maximum 4 entries. Thus, you can only create maximum 4 Primary partitions on a MBR hard disk.

Better than MBR style disk, GPT disk can have up to 128 Primary partitions.

Logical Partition can only be created on MBR disk, in addition, it can only be created in the Extended partition. If you want to create more than 4 partitions, one of the entry in Master Boot Record must be assigned to the Extended partition. That means, in a MBR disk you can create 4 Primary partitions, or 3 Primary partitions plus an Extended partition. Extended partition works like a container and you can create many Logical partition in it.

Tip You can convert disk from MBR to GPT without losing data via free partition software.

How to convert Primary partition to Logical

Download NIUBI Partition Editor, you’ll see all disk with graphical partition configuration on the right, all available operations to the highlighted disk or partition are displayed on the left side or by right clicking.

As you see, there are 4 Primary partitions in Disk 0, right click the Primary partition that you want to convert and select “Convert to Logical“.

Convert to Logical

Click OK to confirm.


This Primary partition will be converted to Logical.

Primary partition converted


  1. NIUBI Partition Editor is designed to work in its virtual mode, the operation will be listed as pending on bottom left. To convert the real disk partition, you need to click Apply on top left to execute.
  2. System Primary partition is not allowed to convert, otherwise, it’ll cause system boot failure.

Watch the video how to convert Primary partition to Logical without losing data:


Besides converting hard drive from Primary to Logical, convert MBR to GPT disk, NIUBI Partition Editor help you convert NTFS partition to FAT32 and do many other disk partition management operations.