Partitioning an external hard drive

5 pts.
External hard drives
Hard drives
I have just bought a new 500gb external hard drive to back up all my files before having the internal hard drives looked at as one of the is overheating and cutting out all the time. How do I partition the new external hard drive so that I have two drives, one of say 100gb and the other 400gb?

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You can try this program which is freeware, or you can try Partition Magic which is what I’ve used with great success, though it costs a bit.
Good Luck!


You can use the Disk Management tool if you are using Windows Operating System. However, it is not actually advisable to partition an external hard disk drive into 100 gigabytes and 400 gigabytes. Disk partition is best when there are equal storage space between partitioned drives or it is better to create just a single partition since it is an external hard disk.

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  • ToddN2000
    Partition Magic is the way to go. I have used it numerous times. I agree with the other post above, I would only use it on internal drives. I do no know of anyone in out network group that would recommend partition an external drive. Even our 3TB drives are not partitioned.
    136,960 pointsBadges:
  • Brijesh

    Do the following steps to partition the external hard drive:

    Step 1:

    Attach the external hard drive to the computer.

    Step 2

    Click the "Start" button, right-click "Computer" and choose "Manage" to open the Computer Management window.

    Step 3

    Click "Disk Management" under Storage. Select the external disk drive under Volume. Right-click on the area labeled "Unallocated Space" and then select "New Simple Volume" from the menu. A wizard appears to guide you through the process.

    Step 4

    Enter a size for the new partition. The default value is the full capacity of the external hard drive. Choose a smaller size than the default if you intend to create multiple partitions on the drive and then click "Next."

    Step 5

    Assign a drive letter to the new partition. The default is the next available sequential drive letter. Keep the default or choose another letter from the drop- down list. Click "Next" to continue.

    Step 6

    Choose a file system format. The choices include NTFS, exFAT, FAT, FAT32 or GPT, with the default being NTFS. Decide whether to set an allocation size, assign a label or name to the new volume or whether to enable compression. Click "Next."

    Step 7

    Review the settings on the summary page and click "Finish" to complete the disk setup. Windows begins to format the external hard drive. The time it takes to complete the task depends on the size of the new hard drive and the settings.

    Step 8

    Close the Computer Management window once the formatting gets over.
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