I suppose you do it externally - booting from a live USB to access the drive you wish to save?
I could be wrong but I cannot imagine I back up my entire OS installation while I am running it.
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I took the liberty of mixing different Question and Answer. But the result is true:
I think @FrenchPress advice to use GUI version, from her personal experience, is good for @thirteenth_13 to try first.
I have this mental picture of @Aravisian putting old phone books in a compactor and storing the paper bales.
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You are right!
I forgot he has tools of the trade 
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after backup,all set and ready to enjoy?
In theory, yes.
But if you want to be absolutely sure with an integrity of your back up, you can run a restore operation on the spare SSD/HDD to confirm it.
This is a completely optional step recommended for those cases where the installation is mission critical.
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While running.
Click on ~/.config, ~/Pictures, so on and so on. Compress, then move the compressed file to a back up location. External Drive, SSD, Google-Drive, whatever.
Once this is done, it does not need to be done anymore. That's the problem with many back ups, is you must redo it each and every time.
After that has been done, periodically move changes to the compressed directory to replace the old - with drag and drop.
Let's say I change some documents or make a new document in~/Documents.
I just drag and drop the new doc or revised doc to the compressed directory and it will compress and add it. If I am in a hurry or feeling lazy, I'll just drag and drop all contents.
And since I do this when or as changes are made (Most of the time, anyway), my backups are good to the minute, not to last week or even yesterday.
Lastly, it spares the Bloat of backing up things I do not need or even want to save using a Back Up manager.
I got into this habit when I was new to Zorin and had to wipe and reload a lot after utterly destroying the system experimenting.
Finally, I never recommend backing up Root.
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Came after a lot of conversations I suppose 
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thank you for the help, really helped me, and also added new insights 
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Yet another debate over the backup strategy.
There is more than one way to do it, which means there is no perfect method discovered yet 
Whatever the method you chose I do NOT recommend a built-in backup tool (Daja-Dup) comes with Zorin.
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Actually, there is. Here, I will link you to it:
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You again stole my mouth's words
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I still think Rescuezilla is easier to preserve a fleshly installed perfectly functioning system.
As long as user keeps a good daily or hourly or minutely backup of the personal data, recovering from a disaster using the disk image would be much easier than start from scratch.
Considering the amount of time we all pored here to make @thirteenth_13's system to get up and going - he surely should make at least one disk image to preserve those efforts.
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Any particular reason not to recommend Zorin "Backup"(Deja-Dup)?
I backup my profiles /home folders with it, doing full backup each time, not incremental back-up's.
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Some users on this forum in addition to my daughter-in-law failed to restore using DejaDup. I think @Aravisian explained in the other thread - if there are any changes made in the installed apps after DejaDup imaging, it could get messy to restore.
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DejaDup also formats the back up in it's own format that you cannot access without dejadup. Any corruption on that point can cause the data to become much harder to retrieve.
A user had started a thread on here not long ago with that very problem.
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What, even when confined to /home folders and files?
I am not sure how changes to installed app's would drastically affect conents of /home, but maybe just my ignorance.
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That I do not know.
I think the people had a problem in entire OS backup including my daughter-in-law.
I understand. Yes if you have a different version of DejaDup then I could see that may cause problem in restoring a backup from older version of DejaDup maybe.
I too would not use DejaDup for whole system backup. Rescuezilla/Clonezilla image backup tools are better suited to that purpose IMO.
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