if you can see it in disk managment then you can try Diskpart run command prompt as administrator type diskpart type list disk type select disk # while using the appropriate number. you can determine your disk by its size/freecspace etc. type clean type create partition primary type select partition 1 type format fs=ntfs quick type assign that should fix your disk and ensure that it's accesible in the file explorer. if in any of the steps you encounter an issue, you'll at least get a message like it is write protected or something. In my experience, if that happens (the unremovable write protection for example) then the disk is fried.

Hi Alif

I am Dave, I will help you with this.

Rest assured, you can reinstall Windows 10 at any time and it will not cost you anything!

You are correct a full clean install will get the best possible performance form that new SSD

Click this link:

https://www.microsoft.com/en-us/software-downlo...

to download the Media Creation Tool (Click on Download Tool Now), with that you can download the latest Windows 10 ISO (Select Create Installation Media for Another PC), you can create a bootable USB flash drive (min 8GB) using that tool

Remove the HDD temporarily during the installation

Then, Boot your PC from the Installation Media you just created (change Boot Order in your BIOS) to begin installing Windows 10

Since you previously had Windows 10 installed and activated on that PC during the installation process skip the steps which ask for a product key and select the option 'I am Reinstalling Windows 10 on this PC', and activation will not be an issue, your PC will have a digital entitlement stored on the Microsoft Activation Servers

Then when the installation completes, to remove the Windows installation from the HDD and use that as a data drive, here are the steps.

Copy off any data you need to keep form the HDD temporarily, this is important.

Open Disk Management

Right click and delete any partition on that HDD

Then when the whole HDD is marked as Unallocated Space, right click that and choose New - Simple Volume and accept the defaults.

Welcome to the Dell Community @Cita-Dell  Have only the M.2 SSD installed. Go into BIOS and see if the drive is detected. In the BIOS set SATA Operation to AHCI. Now try to install W10. Best regards, U2

I have already bought an usb stick containing Windows 10. You didn't need to buy the installer, per se, more so the license key. You can fabricate the installer for Windows 10 using Windows Media Creation Tools. Here's a guide made by one of our very own; https://forums.tomshardware.com/faq/windows-10-clean-install-tutorial.3170366/ should help you keep your head above the water and then some more! Please make sure though that you don't have any other storage options plugged to your motherboard outside of the USB installer and the drive you want to install the OS onto. Once your OS install is complete, install drivers manually and then shut down, then drop in any and/or all storage drives into the system.

You’ve got to enable UEFI to boot off NVMe drives. You’re doing it wrong, not Microsoft.