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How to back up and wipe your Mac
It’s a simple matter to back up and reset your Mac.
Even better, pick two: strictly speaking, you should always have a couple of copies of your most important data — otherwise, if one of your backups goes down for whatever reason, you’re left without a safety net. macOS also offers Time Machine, which puts file backups on local storage drives connected via cables or over Wi-Fi: Tools like Google Drive and Dropbox work just like iCloud does, syncing specific folders to the web and updating changes as soon as they’re made.
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