In an ideal world, this book wouldn’t exist. You should never need to worry about the specifics of where your documents, photos, videos, and other files are stored, only that they’re safe and accessible when you want them.

We live in the real world, though, and you’re likely reading this because your current storage arrangement needs adjustment: You’re running out of disk space. You need to replace or repair a drive that’s not working, or you suspect a drive is on its last days. Perhaps you’re in the market to buy a network-attached storage (NAS) device, but the sheer number of options is overwhelming. (Or, you might just like to learn new information. Hooray for curiosity!)

Storage mostly recedes into the background—until something ...

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