You probably think Blu-ray is the latest, greatest, up-to-datest thing in optical tech right now. You probably think, "Wow! 25 gigs on a single disc! Great!" What if I told you there’s a disc that can hold 20 times that amount to the tune of 500GB? Enter the GE holographic disc. Yes, it sounds like something straight out of Star Trek, but...

You may have a disc, be it music or data, that is scratched and will not read in your optical disc drive no matter what you do to it. Can it be saved? Possibly. There are a few things you can try to save that disc. Hardware method: It could be just the drive you’re using If the disc won’t read in your optical drive, try another one that’s...