Check if a Disk uses GPT or MBR Partition
There are three methods by which you can if a Disk uses GPT or MBR Partition. They are: Let us talk about them in detail.
1] From Disk Management
The easiest way to check if a Disk uses GPT or MBR Partition would be to do it from the Disk Management window. To do that, launch Disk Management by Win + X > Disk Management. Now, right-click on the Disk you want to check the partition of, select Properties, and check Partition style to know if that Disk uses GPT or MBR. Read: How to Convert MBR to GPT Disk.
2] From Device Manager
If you are not familiar with Disk Management then try doing the same with Device Manager. To do that, launch Device Manager by Win + X > Device Manager. Now, expand Disk drives, right-click on your Disk, click Properties, go to the Volume tab, click Populate, and check Partition style to know if that Disk uses GPT or MBR.
Read: GPT or MBR: Which format should you use for SSD?
3] By Command Prompt or PowerShell
If you are familiar with Windows Command-line interpreter then you can use either Command Prompt or PowerShell to check partition type by just typing some commands. To do that, launch Command Prompt or PowerShell as an admin from Start Menu.
Type following commands for Command Prompt. Check GPT, if you are not seeing anything under it then it has MBR Partition.
Type the following command for PowerShell Check Partition style in the result to know your partition type. Hopefully, this has helped in finding your partition type.