Drive and Space

[Tat Leung Ip]

I am Hong Kong Chinese. I use Windows 10 English version.I tried to transfer space (100 GB) from D: to C: Disc Management > right click D: > shrink volume, enter 100 GB, then those 100 GB became unallocated (still in D: , but unavailable) > right click C: , but extend volume is grey, could not transfer those 100 GB to C: . Then I tried to make those 100 GB available again in D: Disc Management > right click D: > click extend volume > next > next > finish. But those 100 GB are still unavailable in D: .Question 1: How to make those 100 GB available again in D: ?Question

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