Creating a simple volume?

Hello to you

If you look at the first photo of post #4, you'll see that the disk is indeed there, but registered as storage space.
This allows you to "extend" another disk, it's managed by the OS.
Personally, I don't like it much.
You'll need to remove it from there.
Go to the storage space, like in post #4

Follow this tutorial:

http://www.it-connect.fr/supprimer-un-espace-de-stockage-sous-windows-8/_
Remove the disk from the storage space.

Then, go to the disk management, it should appear there.
Create the partitions as you wish...

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There are three kinds of people: those who can count and those who can't.

Enter the BIOS by repeatedly pressing F2 or Delete as soon as you power on, to see if it's there...
In the disk management, are you sure it's not there?
How many GB is this HDD...maybe you need to download a driver....
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"Who wants to climb a mountain starts from the bottom!"
Signed: "Gillette" a.k.a. "nobody"! ;) (°!°)

Right-click on the Seagate in the device manager and "search for drivers"... what does it say?

--
"Who wants to climb a mountain starts from the bottom!"
Signed: "Gillette" a.k.a. "nobody"! ;) (°!°)

Hello to you :)

@romaincotillard, I join @poupougne13 (hi @poupougne13 :) ) and I think there might still be one more option to check.

If the Device Manager sees and recognizes the internal 1TB HDD, we could consider calling (so to speak) the newly-installed hardware. This is a command to be entered via the command prompt. Don’t hesitate to try: access the command prompt (admin) > type diskpart > hit Enter > type rescan > hit Enter. Do you see the HDD in Disk Management then (restart your PC if necessary, please).

@poupougne13, what do you think?

Looking forward to hearing from you, @romaincotillard :)
Have a great day you two!

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If you have found the answer to your question, don't hesitate to click on Resolved to help other members with the same issue ;)

I will check the BIOS.
In disk management, I don't see it. However, I went to the Device Manager, and it's there. Also, I typed "storage" in the Windows 10 settings (not the control panel) and it appears under "Manage Storage Spaces". Here are two screenshots:
"Manage Storage Spaces":
_Device Manager:
__What do you think?

Show disk management, please....

--
"Who wants to climb a mountain starts from the bottom!"
Signed: "Gillette" alias "nobody"! ;) (°!°)

Excuse me, I had forgotten.

Ironically, even the SSD management software provided by Samsung shows me the HDD:

Is this HDD from To?
I wonder WHO could have installed it like this, having made so many partitions !!!!
Do you already have data on this HDD?
--
"Who wants to climb a mountain starts from the bottom!"
Signed: "Gillette" a.k.a. "nobody"! ;) (°!°)

Here is what I typed in cmd:

_
Here is what I saw after restarting in Disk Management:

Finally, I solved my problem. I changed the SATA connection of the hard drive directly from the motherboard.

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Processor: Intel i5-7500
Graphics card: NVIDIA GeForce GTX 1060 0
Motherboard: Gigabyte GA-B250M-D3H
8GB RAM - DDR4
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