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I also have a clone of my machine when it was Yosemite. Anyway, I use time machine to back it up and about 6 months ago, I started cloning my machine in Sierra. Constantly! So I reboot and sometimes it goes away, sometimes I turn it off completely for an hour. Ever since I updated to Os SIERRA ( not High SIERRA) I have been getting the beachball. I have a Mac Book Pro retina that I purchased in May 2013. If I can’t find a method to backup without Time Machine I suppose I might try his suggestion. I saw someone suggest that maybe my wireless was slowing things down and that I should connect my MBPro directly through the Thunderbolt port. I figured from the rate the update was taking that it would have taken at least a month. The backup of my hard drive started and the time calculation to complete was originally 1 hour, then 2 hours, then 27 hours.
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Instead I got a message asking whether I wanted to reinstall High Sierra. Suffice it to say the recovery screen never came up. I followed the instruction to their sixth step at which point the “recovery screen” was supposed to appear with a spinning globe. There is a wikihow article entitled “How to back up a Mac without Time Machine”. I’d prefer a method of backing up that can be done without being so connected. It appears that Time Machine involves an interaction with Apple that requires connection to the internet when backing up. The main takeaway here is to back up your Mac with Time Machine or another app, and create a second or third copy of those backups if you can. Although you could try a third-party Mac data recovery software, chances are they won’t get all your lost data back. Without a proper backup, it’s really hard to restore data. I can’t emphasize enough the importance of data backup these days.
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Backblaze and Carbonite are also popular options in the market, though I am yet to give them a try.
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One good option is to use cloud storage services like iDrive which I’ve been using and I really like the app because it’s super easy to use, and it also allows me to download Facebook photos automatically. It’s best to make a copy of the data on your external drive - as they say, a “backup of your backups”!
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Like any other hardware device, an external hard drive will fail sooner or later. Then, you can safely unplug the device and put it in a safe place. Instead, go back to the main desktop, locate the volume that your external hard drive represents, right-click and select Eject. When the backup procedure is completed, don’t rush to disconnect your device as this could cause potential disk problems. After about an hour and a half, it says only 15 minutes remaining Step 5: Eject your external drive and unplug it.
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