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#21
You typically do not image to DVDs. The images can be quite big - e.g. 10 to 50GBs depending on the system size. The compression is a little less than half. You image to an external disk where you define a folder for the images. I have external disks with many images from 3 different systems in 3 different folders and other data folders too. An image is nothing else than a file - just a bit big.
You do, however, need the recovery CD that you burn from the imaging program - this is the first step and takes only a couple of minutes. When you need to pull an image in, this recovery program is being loaded from the CD/DVD reader (need to set up the BIOS boot sequence accordingly). It contains a small Linux distro and a program that rewrites the image to the OS disk - even if that is a new disk because the old one was kaputt.
PS: when you buy your external disk, I advise to buy at least 640GBs. Then you can image galore and still have space for other stuff.
When you have time, watch the video tutorial. I think things will become clear. I will go to bed now (it is past 1AM) but I will be back tomorrow to answer any further questions.