I have written many times about the need for genealogists (and others) to make frequent backups. Now Oluwademilade Afolabi has published an article in the MakeUseOf web site that explains the differences of different kinds of backups.

If you are a bit confused about the different kinds of backups and the pros and cons of each, you might read the article at: https://www.makeuseof.com/ways-to-back-up-data/.