Windows 10 I cannot make a new volume out of unallocated space on my disk.

[RadmanHz]

I have about 150 GB of unallocated space recently opened after deleting my second Windows. First, I was able to make it into a New Volume, although I decided to delete the volume to merge it to an existing drive. I tried the "Extend Volume" option, however, an Error popped up: "There is not enough space available on the disk to complete this operation." Afterward, I wasn't even able to create a new volume with the space.

I have tried Rescan disks and Refresh, and they didn't work. I cannot seem to be able to use this 150 GB in any way. This is a screenshot of my Disk Management:





I would appreciate your help.

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