Burn Failure...Argh!

Half way through a DVD backup burn for my Rat Rod Rockers! movie files (and drive) and the computer jams up, mouse disappears, etc. I was on disc 59 0f 101- eeeeek! Took four days! Threw the 59 DVDs away and started again. This time only backing up the core Rat Rod Rockers! files. This burn spans 47 discs so...