How to Partition an external hard drive on Windows Vista

To format an external hard drive on Windows Vista, plug the hard drive in, then click on start menu, right click on "computer", and select "manage". Go to "storage" on the left hand menu and select "disk management". Right click on the letter of your external hard drive, and select "Shrink Volume". Choose the size of the partition you want to create, and click shrink. After it is done, there will be 2 seperate drives, with the new one being allocated. Right click on the unallocated drive and select "new simple volume". Assign a drive letter to the new drive, and format it using NTFS format. Leave all other options to default. If you want the new drive to work on both MAC and Windows, format it again but this time format it with FAT format, but remember the maximum file size in a FAT format is 8GB