Tech-Critic: " ByteGuardian is an unique tool that allows you to protect your most important files against digital corruption. Data can get corrupted for many reasons, viruses, hardware or software failure and so on. When this happens a simple backup just won't always do. ByteGuardian can tell you if your files have been corrupted, and what's amazing, it can automatically fix them!

Did you know that a typical CD-R disk can start to lose its data a bit by bit even after a few years after its creation? ByteGuardian solves that problem, but it's not specific to CD-R's or to any other media, it works with all kinds of files and with any media, CD-R, DVDs or normal hard drives. $40 -- sorta costly."