The reasons to lose priceless data are known. Viruses, HDD crashes, file system damage, theft, laptop left in a taxi, coffee spill, flood, fire, hurricane, earthquake… Is it enough? In fact, data loosing is not a question of reason – it’s a question of time. More, statistically one in ten hard drives crash every year, while even an attempt of data recovering is very pricey. (Specialized companies charge about $3,000 with no guarantee).
Traditional local backup methods such as CDs/DVDs and external HDDs are expensive and susceptible to damage from scratching, water, temperature change, plus … read above. Even a new, fresh-burned optical disc may contain errors, that once can become residual – no matter have you done time-consuming data verification right after the burning, or not.
Furthermore, these methods require time, empty discs, and manual intervention. Look, you need to insert discs manually. Even if you’re doing space-saving incremental backup, you need to have fresh ones because you don’t know when your media will be totally filled. I don’t say about Blue-Ray writable discs (BD-R or BD-RE) that are even more expensive, and not every computer have Blue-Ray drive. The popular netbooks even have not DVD-drives! This means that backup is not doing regularly, and once your important data may be lost.
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