We recommend that you always create images in O&O DiskImage’s own format. This will allow you to work easily with the image in the future and use all the program’s features on it. If you do wish to use a different format, please use conversion. This feature will allow you, for example, to change the format of your O&O DiskImage file into a virtual hard disk.
You can also combine the images of changes into one complete image. This can be helpful when, for example, you want to save older image files and improve the clarity of your archive.