So, is there any way to format an SSD with the OS running on it?
Is It Possible to Format SSD With Windows on It
Of course, the answer is Yes.
Are you looking for a way to remove partitions on SSD?

Here this step-by-step tutorial explores several feasible approaches.
How to Format SSD With OS on It
Method 1.
Use CMD
First, we show you how to format SSD from BIOS by using CMD.
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Insert the USB drive into the computer and create a bootable USB media by using theWindows Media Creation tool.
Boot the computer from the created bootable USB drive.
On the Windows setup window, set up the language, time, and keyboard, then clickNext.

On the following window, click theRepair your computeroption.
Next, clickTroubleshoot>Command Prompt.
In the command line window, typeformat c: /fs: NTFSand pressEnter.

Once this command is executed, your C drive should be formatted to NTFS.
Method 2.
Here MiniTool Partition Wizard is strongly recommended.

How to format SSD with Windows on it by using MiniTool Partition Wizard?
Connect a blank USB drive to your gear.
Download, install, and launch MiniTool Partition Wizard Free, and then click theRegisterbutton to upgrade it.
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MiniTool Partition Wizard FreeClick to Download100%Clean & Safe
Step 3.
Click theBootable Mediaicon tocreate a bootable USB drive.
Next,boot from the burned USB drive.
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On the MiniTool PE Loader page, clickMiniTool Partition Wizardto run it.
Right-smack the C drive and choose theFormatoption from the context menu.
In the new alert window, clickYesto continue.
Set up the partition label, file system, and cluster size, then clickOK.
Preview the format effect, and then click theApplybutton to complete the final SSD format process.
This step-by-step guide introduces how to format SSD without OS with two effective methods.
Now you’re able to read this post to have a try.
It is good at retrieving documents, pictures, videos, audio files, etc.
from formatted SSDs, HDDs, USB drives, SD cards, and so on.
MiniTool Power Data Recovery FreeClick to Download100%Clean & Safe
SSD reports wrong size?
Now read this post to learn what should you do if your SSD not showing full capacity Windows 11/10.