In Windows 7, click Start, or in Windows 8, go to the Search charm. Either way, type Partitions then select Create and format hard disk partitions.
The Disk Management program will come up. To shrink the existing partition, right-click it and select Shrink Volume.
Then wait. It may take a while Eventually, a dialog box will ask how much you want the partition shrunk. The default number will be the maximum available.
And therein lies Disk Management’s problem. If the current partition has 228GB free drive, you should be able to shrink it by anything less than 228GB. But Disk Management may not let you shrink it anywhere near that much. If the program won’t allow you to shrink the partition as much as you want, skip to the last paragraph.
Let’s assume that Disk Management allows you to shrink the partition sufficiently. In that case, set the right size, click the Shrink button, and follow the prompts. When the re sizing is done, right-click the physical drive’s unallocated space and select Simple New Volume.
Then follow the wizard.
But if Disk Management can’t shrink the partition as far as you want it to, it’s time to go with a third-party program. I recommend EASEUS Partition Master Free. It’s simple and, as the name implies, free. And it can shrink your partition until there’s almost no empty room. But when you install it, select the Custom Install option to avoid installing extra, unwanted programs.