Windows 10 does not upgrade to actual disk size. It displays old disk size.
How do I tell D: that is a 12TB capacity instead of 4TB? Do I need some how to resize the volume manually?
I upgrade the disk substituting two 4TB HDDs (two-way mirror) with two new 12TB. I make the substitution one by one. All the data is there in the new disk.
Storage space 3,6TB [OK] Not formatted storage space
Manage Storage Spaces physical drives shows properly 12TB and 30% used as expected.

But looking at Disk Management, and inspecting properties of Windows D: the drive is still 4TB (and close to full).

How do I tell D: that is a 12TB capacity instead of 4TB ? Do I need some how to resize the volume manually?
At the moment the only thing I found was this 2013 bug that is still there:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/90556310-26a4-482f-9a2b-8458d6feda8f/server-2012-twoway-mirror-storage-space-displays-incorrect-capacity
PS: To fix this bug/issue my first idea was to delete the storage space group pool and create a new one.
But in Manage Storage Spaces if I select "delete", this ridiculous interface, will delete all the files that it contains and can't recover the files.
(At the moment it does not look like a good idea or pointless for a non-advanced user to use Manage Storage Spaces.)
