In the past if we needed to resize a partition in Windows we had to use a 3rd party utility such as Partition Magic, Disk Director etc. Now the recent windows operating system such as windows Vista, 7 and 8 contains a new feature which allows users to manage free space on the hard drive. Using this feature can shrink a single partition with unused space, and then create a new partition in the resulting free space, as well as extending a current partition if there is available free space after it.
Shrink and Extend Windows Partitions or Volumes
1. Press Win+R to open the run box
2. Type in diskmgmt.msc and click OK
3. Press the Continue button if you need to grant permission
4. Right-click on the partition you wish to shrink
5. Select Shrink Volume…
6. Select your settings and click the Shrink button
When this operation has completed, you will now see that you have a selected amount of unallocated free space available.
To extend volume, locate the partition to be resized from the Disk Manager, right click on it, and from the menu select Extend Volume. The Wizard will then open up, click Next. You will then be presented with a dialog box to select the disks to extend. Select the amount of space in MB to extend the volume, and click next. The selected partition will then be extended by the amount selected.