I'm a fan of the cloud, but I would never consider it a 'backup.' I use it as a convenience. There has already been one major cloud service to close up overnight taking their client's files with them. Use it for convenience, but do not rely on it to be there 2 months from now because it may not be. There is always the possibility that your information could disappear due to a faulty server and insufficient backup by the company. O a demand by some publisher to remove all access to an ebook you bought. Or financial circumstances force you to drop wifi access or even computer access. I know a couple of elderly people who sold their home to move into a retirement community - there is no wifi.
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