Pain in the Back-Up

After taking the back up on the other computer I thought that I would write every single file that used to be on my computer on 4 DVD’s. So I got 4 DVD’s and guess what??? The computer’s DVD writer is not working properly. So if I still plan to write on a disc then I will require around 21 CDs and writing on these 21 CDs will take ages. I don’t know what I will do. Changing your OS is a pain in the A$$.