Diskmgmt

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I have a dual boot setup with Win 8.1 and Win 10 TP 10041
Default OS is Win 8.1 Pro.
I want to allocate additional volume from Win 8.1 partition to Win10TP partition.
How do I do that without using a 3rd party program. ( I do have MiniTool Partition Wizzard installed but not sure it can be used for this purpose.)

Here is my diskmgmt screenshot.............
C: is my Default partition.

P.S. I was told that I cannot create any more partitions because I have exceeded the limit ( or something like that ).

diskmgmt.jpg
 
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D: is a logical partition, which is created within an extended volume. The extended volume counts as one of the 4 max partitions allowed. But within the extended volume, you can create many more logical partitions.

I am confused as to why there is 2 partitions that are the same size and appear to be the same content (labeled Recovery).
 
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D:

I am confused as to why there is 2 partitions that are the same size and appear to be the same content (labeled Recovery).

So am I.
I admit I had been messing around with installing and uninstalling OSes.
I did a dual boot, then remove it. Then install Win 10 T as sole os. Then, reinstall Win 8.1 as sole OS. Then dual boot again.
During the process of the musical chair, I deleted the Windows.old each time.
Then, there is this 1.99 GB partition which I failed to remove.
I think I screw up the C drive pretty well.
I think I am going to do the "remove the volume" on the last Recovery drive and see if I can add the 450 MB back to the 1st Recovery .
 
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By the way, let it be clear that my intention is to take say 10 GB of volume from C and allocate to D.
I need to know how.
 
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You can adjust the sizes using Partition Wizard. You can also slide the recovery partition to the end, opening more space behind D.
 
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I'm not sure what you are asking. For what you want to do, the version of Windows is basically irrelevant.
 
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