Made backup on dvd and pc restart before end

I made a dvd backup from mine files, after two days and 70 dvd's their was in the night a restart from windows for a update.
And olso on the 56 dvd their was a problem with a dvd. When I take him out I see that the disk is defect.
Their was I think 5 disk before finish the backup.
Can I do somthing or have I start al over again. 70 dvd and a lot of work are gone then.

 

That's a very large volume of DVDs to backup to. The risk of a defective disk or damaged disk will render all the DVD's useless. We strongly recommend you use an internal/external hard drive to backup to for that amount of data. Other benefits include the ability to update your backup on a regular basis without using additional DVDs.

Unfortunately, there's no way for us to resume a previous backup without doing it again. As I'm typing, I presume your system has changed and the last backup is already considered outdated and not replicable.