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The DSLR Field Guide by Michael Freeman

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Long-term Storage

Unlike film and transparencies, which have a physical fragility and are susceptible to being scratched or suffering some other type of damage, digital files in one sense are much more robust.

However, as we know digital files can easily become corrupt or even lost, so it’s important to keep them safe.

Your computer’s hard drive, no matter how large, will eventually fill up, and for this reason alone it is important to move the files to other media. Moreover, having a backup is a part of good computer housekeeping—remember that the high-volume solution for most people is an external hard-drive, and preferably more than one. Mirrored hard drives, meaning one carrying an exact copy of the other, are standard insurance. In addition, ...

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