How to create a new drive when there is no unallocated space

my pc hard disc is 0f 500 GB.....the problem is that
when i go to disk management option there is no unallocated space...which i can use to create new driveas my c drive is of 451 Gb...how to get unallocated space..??
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  1. besure said:
    my pc hard disc is 0f 500 GB.....the problem is that
    when i go to disk management option there is no unallocated space...which i can use to create new driveas my c drive is of 451 Gb...how to get unallocated space..??

    Look up the difference between Gigabyte and Gibibyte - you'll find where your "missing" 50 GB went. Short answer: a 500GB drive, when formatted, amounts to 461 GiB = 500,000,000,000 bytes. Then you need to remove some spare clusters, the file system's metadata, recovery data etc.
  2. You can 'shrink' your current single volume.

    Shrinking your 451GB volume to 301GB will give you space for a 150GB partition.
  3. EaseUS Partition Master Home Edition
    http://www.partition-tool.com/
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