How to Create a Partition

This wikiHow teaches you how to divide your computer's hard drive into two distinct sections (or 'partitions'). Partitioning a hard drive allows you to treat the hard drive like two separate hard drives, which is helpful when installing...
Method 1 of 2:

On Windows

  1. How to Create a Partition Picture 1How to Create a Partition Picture 1
    Open Start
    How to Create a Partition Picture 2How to Create a Partition Picture 2
    . Click the Windows logo in the bottom-left corner of the screen.
    1. You can also press the Win key on your computer's keyboard.
  2. How to Create a Partition Picture 3How to Create a Partition Picture 3
    Type computer management into Start. This will search your computer for the Computer Management program.
  3. How to Create a Partition Picture 4How to Create a Partition Picture 4
    Click Computer Management. It's at the top of the Start window. Doing so opens Computer Management.
    1. You may not be able to access this program if you're not using an administrator account.
  4. How to Create a Partition Picture 5How to Create a Partition Picture 5
    Click the Disk Management tab. This tab is in the sidebar on the left side of the Computer Management window.
    1. If you don't see this option, first double-click Storage.
  5. How to Create a Partition Picture 6How to Create a Partition Picture 6
    Select your hard drive. In the window near the bottom of Computer Management, click your hard drive's box. This box should have the hard drive's letter (e.g., "(C:)") as well as the number of gigabytes (GB) of storage available to use.
  6. How to Create a Partition Picture 7How to Create a Partition Picture 7
    Click Action. It's a tab in the upper-left side of the Computer Management window. Doing so prompts a drop-down menu.
  7. How to Create a Partition Picture 8How to Create a Partition Picture 8
    Select All Tasks. This option is near the bottom of the drop-down menu. Selecting it prompts a pop-out menu to appear.
  8. How to Create a Partition Picture 9How to Create a Partition Picture 9
    Click Shrink Volume…. It's in the middle of the pop-out menu. Clicking Shrink Volume... will prompt Windows to determine how much free space you have. When it finishes doing so, a new window will open.
  9. How to Create a Partition Picture 10How to Create a Partition Picture 10
    Determine your partition's size in megabytes. Type the number of megabytes that you would like your partition to be into the "Enter the amount of space to shrink in MB" text field on the right side of the page.
    1. The maximum number of megabytes that you can allocate is listed directly above the field that you type in.
    2. There are 1000 megabytes (MB) in one gigabyte (GB). To create a 5 GB partition, you would type 5000 into the text field.
  10. How to Create a Partition Picture 11How to Create a Partition Picture 11
    Click Shrink. It's at the bottom of the page. This will begin creating a segment of your hard drive to serve as the partition.
    1. This process may take a few minutes.
  11. How to Create a Partition Picture 12How to Create a Partition Picture 12
    Select the new partition. Click the new partition, which will say "Unallocated", to the right of the hard drive's space.
  12. How to Create a Partition Picture 13How to Create a Partition Picture 13
    Click Action again. This tab is in the upper-left side of the window.
  13. How to Create a Partition Picture 14How to Create a Partition Picture 14
    Select All Tasks, then click New Simple Volume…. It's near the top of the pop-out window.
  14. How to Create a Partition Picture 15How to Create a Partition Picture 15
    Click Next. It's in the bottom-right side of the window. This will take you to the beginning of the partition setup.
  15. How to Create a Partition Picture 16How to Create a Partition Picture 16
    Click Next. Doing so will accept your partition's size and take you to the next page.
  16. How to Create a Partition Picture 17How to Create a Partition Picture 17
    Select a drive letter, then click Next. You can change the partition's drive letter (e.g., "E") by clicking the drop-down box and then clicking a new letter.
    1. This is an optional step.
  17. How to Create a Partition Picture 18How to Create a Partition Picture 18
    Check the "Format this volume with the following settings" box. It's near the top of the page. This option will set up your partition with Windows default settings, which will allow it to work with Windows like your regular hard drive.[1]
    1. If the "File system" box doesn't say "NTFS", click it and then click NTFS. This will format your partition for Windows.
    2. You can also change the partition's name in the "Volume label" box.
  18. How to Create a Partition Picture 19How to Create a Partition Picture 19
    Click Next. It's at the bottom of the page. This will take you to the final page.
  19. How to Create a Partition Picture 20How to Create a Partition Picture 20
    Click Finish. Doing so will begin partitioning your drive. Once this process completes, you will be able to interact with the partition in the This PC program; it will appear alongside your hard drive in the "Devices and drives" section.
    1. Partitioning can take several minutes to several hours, depending on the size of the drive and the partition's size.
Method 2 of 2:

On Mac

  1. How to Create a Partition Picture 21How to Create a Partition Picture 21
    Click Go. This tab should be in your Mac's menu bar at the top of the screen.
    1. If you don't see Go, click the desktop or open a new Finder window to make it appear.
  2. How to Create a Partition Picture 22How to Create a Partition Picture 22
    Click Utilities. It's at the bottom of the Go drop-down menu.
  3. How to Create a Partition Picture 23How to Create a Partition Picture 23
    Double-click Disk Utility. This icon resembles a Mac hard drive with a stethoscope on it. Doing so will open the Disk Utility program.
  4. How to Create a Partition Picture 24How to Create a Partition Picture 24
    Select your hard drive. Click your Mac's hard drive in the upper-left side of the Disk Utility window, just below the "Internal" heading.
  5. How to Create a Partition Picture 25How to Create a Partition Picture 25
    Click Partition. This tab is at the top of the Disk Utility window.
  6. How to Create a Partition Picture 26How to Create a Partition Picture 26
    Click +. It's below the hard drive circle that's on the left side of the page.
  7. How to Create a Partition Picture 27How to Create a Partition Picture 27
    Determine your partition's size. Click and drag the knob at the bottom of the hard drive circle counter-clockwise to increase the partition's size, or clockwise to reduce it.
    1. You can also type a number in gigabytes (GB) into the "Size:" field to set your partition's size.
  8. How to Create a Partition Picture 28How to Create a Partition Picture 28
    Select a file format for your partition. Click the File format drop-down box, then click a format. This will set your partition's file system as your selected format.[2]
    1. If you're setting up your partition for use with Mac, click a MacOS Extended option in the drop-down menu.
    2. You can also enter a name for your partition in the "Name:" field.
  9. How to Create a Partition Picture 29How to Create a Partition Picture 29
    Click Apply. It's in the bottom-right corner of the page. Doing so will prompt your Mac to begin creating your partition.
    1. This process will take a while, especially if your hard drive and partition are both larger than one terabyte.
  10. How to Create a Partition Picture 30How to Create a Partition Picture 30
    Click Done when prompted. Your Mac's partition has successfully been created.
5 ★ | 1 Vote