1. On a hard disk
2. On one or more DVD's
3. On a network location
I would use an external hard drive or a second drive if one is fitted. Using DVD's is another option but you would probably need a few. The other alternative is to use a share on a network drive.
Keeping different versions of system images
If you're saving your system images on an internal or external drive, or on CDs or DVDs, you can keep several versions of system images. On internal and external hard drives, older system images will be deleted when the drive runs out of space. To help conserve disk space, you can manually delete older system images. For more information, see What backup settings should I use to maximize my disk space?
If you're saving your system images in a network location, you can only keep the most current system image for each computer. System images are saved in the format of drive\WindowsImageBackup\computer name\. If you have an existing system image for a computer and are creating a new one for the same computer, the new system image will overwrite the existing one. If you want to keep the existing system image, you can copy it to a different location before creating the new system image by following these steps:
Navigate to the location of the system image.
Copy the WindowsImageBackup folder to a new location.
