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Check out the screenshot below, I want to extend my C partition (where Windows is installed) into the unallocated free space shown. This space was cleared up by shrinking the D partition. I can extend the D partition if I want to, but not the C.

Why not?

Screenshot

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up vote 1 down vote accepted

It's because you can only extend a partition if the blank space is directly following it. Your D: partition is in the way.

Perhaps look into a partitioning program like GPartEd.

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Ah, is there no way to move the unallocated block to in-between the two partitions using disk management? – JMK Aug 14 '13 at 11:01
1  
Simplest way would be to create a 40GB partition transfer the data, delete the existing partition extend it the first partition, then reset the drive letter. A tool that avoid doing that was alos suggested. – Ramhound Aug 14 '13 at 11:23
    
Thanks guys, you've both been really helpful :) – JMK Aug 14 '13 at 13:08
1  
Simplest way would be to create a 40GB partition transfer the data, delete the existing partition extend it the first partition, then reset the drive letter. @Ramhound, that’s not as simple as you think; you’ve overlooked the fact that the D volume is 67.42GB and the available space is only 40GB. @JMK, you’ll want to use a third-party partition-management program which can “shift” the D volume down for you (depending on how full it is, it might do a whole lot of thrashing as it moves all the data). – Synetech Aug 24 '13 at 20:25

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