How do I delete a volume that still has Windows on it?

The most straightforward method will be to
1 Disconnect the HDD
2 Repeat the Windows installation Clean Install - TenForumsTutorials
3 Reconnect the HDD, use MiniTool Partition Wizard [free] to delete redundant partitions on the HDD and enlarge any that you do want so you can use the HDD as a data drive.

Denis

WildWiryClam said:

I recently used the Media Creation Tool to create Windows on a SSD, because I wanted to get faster boot times. When I did this, shortly after I chose all the options and signed in, I realized that now my hard drive wasn't getting picked up in file explorer. So I restarted my computer and when it started booting Windows, it asked me which operating system I wanted to go into, and I was really confused at first because I thought it would just automatically delete the OS that was on the hard drive and it would just start fresh like resetting it but it didn't. And now I'm stuck with the OS on the SSD which is what I am currently on and another OS on the hard drive. My main problem is that I cannot use my hard drive while being on the SSD, but I would also like to just have 1 OS like I did in the past. Is there anyway I can just start completely fresh with just the OS on the SSD?

My version of Windows is: Version 21H1 (OS Build 19043, 928)

Windows 10 Home

Post image of disk partitions - it is not necessary to reinstall normally. You can normally sort it in a few minutes with Easeus Partion Master (free version).

WildWiryClam said:

Do I disconnect the HDD in BIOS or IRL?

I meant physically remove its connection.

But if Cereberus can help you sort out the misplaced partitions without a reinstall that would be less work.

Denis

Do you have data on Disk 0 you want to keep?