Converting Unallocated Space on HD That Was a Part of the C: Partition

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I am running Windows 10 with a 1 TB HD partitioned into two different drive of about 500 GB each. I keep my documents, music, photos and other files on D: in the second partition. Unfortunately this give me a C: drive with Windows 10, a few other files and a lot of wasted space. I shrunk it using the Disk Management console built into Windows 10 down to 243 GB and this left 222 as unallocated space.

What I would like to do is either use this space as a new partition or merge it with the current second partition. However when I try to format this unallocated space as a “new simple volume” (the only choice) it walks me through a wizard and then I displays a warning:

“The operation you selected will convert the selected basic disk(s) to dynamic disk(s). If you convert the disk(s) to dynamic, you will not be able to start installed operation systems from any volume on the disks(s) (except the current boot volume). Are you sure you want to continue?”

This implies that the system will still boot (but only from the current volume which is OK by me). However, I am not really sure if that is what will actually happen and I don’t want to end up with a system that will not boot. Could someone please interpret this warning for me in clear language?

Thanks in advance.
Walter

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Use DISKPART from an elevated Command Prompt to create a partition.

Always create a fresh drive image before making system changes/Windows updates; you may need to start over!

We all have our own reasons for doing the things that we do with our systems; we don't need anyone's approval, and we don't all have to do the same things.

We were all once "Average Users".

Computer Specs

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Use a 3rd party disk management program to modify the disk.
http://www.easeus.com/partition-manager/epm-free.html

cheers, Paul

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Use a 3rd party disk management program to modify the disk.
http://www.easeus.com/partition-manager/epm-free.html

cheers, Paul

Can disk management will do it success?

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I don’t think Disk Management will do it, but I know EaseUS will.

cheers, Paul

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Have you tried a 3rd party tool like: http://www.partitionwizard.com/?
I found it easy to use and it did all I wanted when reallocating disk space.

If you get a ‘Disk must be formatted before you can use’ message, the fix disk errors option worked for me without losing any data.

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