I would highly recommend to backup your Mac with Time Machine.  Time Machine is the in-built backup software that comes with MacOS and is a great way to backup up your entire Mac as well as all of your individual files.

Issues do happen with computers as we know ~ hard drives can crash, files can be accidentally deleted and even if you think you are safe by having your data also stored in the Cloud, I have had situations where this data has also been unrecoverable.

Time Machine gives you another option for Recovery of your data.

In this Video I take you through how to do a simple setup of Time Machine on your Mac.  Enjoy!

Here is a link to the password generator website used in the video:  https://randompasswordgenerator.com