https://ioshacker.com/how-to/back-up-restore-mac-using-time-machine
Backing up your Mac is an essential step in making sure you don’t lose your data in an event of software and hardware failure.
Thankfully macOS offers the Time Machine feature, which makes it easy and convenient for Mac users to create a back up of their Mac data and restore it at a later time…
Contents:
1 Back up your Mac with Time Machine
2 Create a Local Mac Back Up
3 Restore Mac From Back up
3.1 How to Use Migration Assistant…Keep in Mind:
Every hour, Time Machine makes a backup of the past 24 hours, every day for the past month, and every week for all previous months. As soon as your backup disk fills up, the oldest backups are deleted. It may take a while for the first backup to complete. You can keep using your Mac without any interruptions during that time.
You have the ability to remove items from your Back Ups. This can be done by going to System Preferences -> Time Machine and then clicking on Options. There click on the ‘+‘ button to add times that you wish to be excluded from your backups. You can remove items from the exclude list by clicking on ‘–‘ button…